Co2 diffuser deals(Disclaimer)
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🏅 110 CO2 Diffuser in price comparison
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💶 Current offers and discounts
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🕝 Last updated on 10.11.2026
25% discount
CO2 Diffuser Aquarium, Aquarium Atomiser, CO2 Diffuser with Suction Cups and U-Pipe, Carbon Dioxide Diffuser, Glass Tube, Aluminium Alloy Aquarium Bubbler Accessories for Aquarium, Freshwater Fish
Refresh the aquarium environment: our CO2 diffuser aquarium is designed to supply carbon dioxide into the fish tank and provides the musty element for photosynthesis and promotes the lush growth of your aquatic plants, thus creating a fresh and healthy living environment for your fish.The ceramic disc is removable and replaceable.
£ 11.99
£ 15.99
To the offer
10% discount
CENPEK 2Pcs Pollen Glass CO2 Diffuser with Bubble Counter for Aquarium Planted Tank
Built in bubble counter. It's very visually appealing.
£ 8.99
£ 9.99
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Vogueing Tool V-AP-007 Carbon Dioxide Diffuser CO2 Atomizerr Refiner for Aquarium Plants Fish Tank Brown-Small
Made of high quality material, which is non-toxic, safe, energy-saving and eco-friendly Simple design and super micro hole atomization Super diffuse efficiency to get the best CO2 dissolved effect Designed for screw lock on the CO2 tube, no need to worry the tube loose off by the pressure and caused damage Used for aquarium fish tank plant carbon dioxide dissolve system
£ 10.59
£ 10.99
To the offer
6% discount
Clscea CO2 Stainless steel diffuser, CO2 Atomizer with Built-in Check Valve and Replaceable Disc for Aquarium Plant Tank
Material: The aquarium diffuser is made of high-quality 304 stainless steel, which is more corrosion-resistant and durable than aluminum alloy.
£ 15.99
£ 16.99
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QWORK® Fish tank atomizer, CO2 diffuser, with suction cups and U-tube, for all types of aquariums
High Quality:Aluminum alloy CO2 aquarium atomizer, safe, energy-saving, and environmentally friendly.
£ 6.45
free delivery
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13% discount
Clscea Aquarium CO2 Stainless Steel Diffuser, S-Hook CO2 Atomizer with Built-in Check Valve and Replaceable Disc for Aquarium Plant Tank, 20cm (S)
One-Touch Connection: One-touch fitting for quick, effortless attachment and removal.
£ 19.99
£ 22.99
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DONGKER CO2 Diffuser, Stainless Steel Aquarium Plant CO2 Atomizer With Check Valve & Suction Cup fit Inner Dia 4mm/outer Dia 6mm Tube for Aquarium Plants Water Grass
304 Stainless Steel Material: smooth surface, strong and sturdy, corrosion-resistant and not easy to rust, long service life, threaded pagoda structure air pipe connector, quick connection inner diameter 4mm x 6mm outer diameter CO2 soft air tube CO2 Refinement And Diffusion: nano-level atomization sheet, uniform and fine bubbles, nano-ceramic refinement sheet, uniform and fine gas disc bubbles, high water dissolution rate Fish Tank Water Grass Plant Growth: diffuser atomization diffuses CO2 gas into the water, improves the growth environment of fish tank water grass, and enhances the photosynthesis of water grass plants in freshwater fish tanks, which is beneficial to the growth of fish tank water grass plants Suitable For Small Aquariums: with check valve, no need to worry about water backflow corroding the aquarium CO2 system.
£ 14.99
free delivery
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Fzone Neo CO2 Diffuser with Customized Ceramic from South Korea(S-13mm) | Fine Mist CO₂ Output, High CO₂ Saturation, Premium Clear Glass Construction, 3 Size Options for Plant Fish Tank
The customized ceramic from South Korea used in Fzone NEO diffuser features microscopically small holes resulting in very fine and thorough bubble diffusion.
£ 12.99
free delivery
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Fzone Neo CO2 Diffuser with Customized Ceramic from South Korea(L-24mm) | Fine Mist CO₂ Output, High CO₂ Saturation, Premium Clear Glass Construction, 3 Size Options for Plant Fish Tank
The customized ceramic from South Korea used in Fzone NEO diffuser features microscopically small holes resulting in very fine and thorough bubble diffusion.
£ 16.99
free delivery
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DONGKER CO2 Diffuser,Acrylic Hanging CO2 Atomizer With Suction Cups & Bubble Counting Function for 4mm/0.16" I.D. CO2 Tube
Note: Acrylic CO2 Atomizer needs to be selected according to the size and height of the aquarium, it is suitable for large and medium-sized aquariums, and the CO2 Atomizer needs to be connected to the CO2 system.
£ 11.99
free delivery
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CO2 Atomizer Diffuser Acrylic Aquarium Carbon Dioxide Transparent Bubble Counter Refiner Aquarium Aquatic Plants (L)
【Nanotechnology】Refinery with the excellent manufacturing of Nano-MBKT technology brings a good refining effect. 【Good Effect】Red chip requires less pressure, especially easy to release air, saving more material. 【Sales Service】 If for any reason you are not completely satisfied with your purchase, if it breaks, if it is damaged in shipping, or if you change your mind - just let us know and we will take care of it quickly! 【Convenient Access to the Aquarium】With independent bubble counting function at the same time, perfect combination with refining.
£ 12.90
free delivery
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Tiardey Aquarium CO2 Diffuser High Transparent Glass Diffuser Fish Tank Carbon Dioxide Reactor Refiner Atomiser for Water Plants Tank
The main body is made of high quality glass, high transparency, curved glass connection pipe, small size and beautiful appearance.
£ 8.99
free delivery
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Vogueing Tool V-AP-022 Carbon Dioxide Diffuser CO2 Atomizerr Refiner for Aquarium Plants Fish Tank Brown-Large
Made of high quality material, which is non-toxic, safe, energy-saving and eco-friendly Simple design and super micro hole atomization Super diffuse efficiency to get the best CO2 dissolved effect Designed for screw lock on the CO2 tube, no need to worry the tube loose off by the pressure and caused damage Used for aquarium fish tank plant carbon dioxide dissolve system
£ 10.99
£ 11.49
To the offer
Fzone Neo CO2 Diffuser with Customized Ceramic from South Korea(M-17mm) | Fine Mist CO₂ Output, High CO₂ Saturation, Premium Clear Glass Construction, 3 Size Options for Plant Fish Tank
The customized ceramic from South Korea used in Fzone NEO diffuser features microscopically small holes resulting in very fine and thorough bubble diffusion.
£ 15.99
free delivery
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20% discount
MiOYOOW Aquarium CO2 Diffuser, Acrylic CO2 Atomizer with Bubble Counter/Check Valve for Fish Tank Aquarium Plants
High-Quality Acrylic: Made of high-transparency acrylic cup body + nano-ceramic thinning sheet, the performance is stable and reliable, can be reused after cleaning, and has a long service life.
£ 11.19
£ 13.99
Only:
98hrs
10min
40sec
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JBL PROFLORA CO2 TAIFUN GLASS MAXI
Beautifully shaped small, very effective, glass diffuser for dissolving CO2 in aquarium water, for perfect plant growth Installation: connect diffuser to CO2-carrying hose (4/6) and attach it near the bottom to the pane with a suction cup Even CO2 outflow & effective distribution: special ceramic for particularly small CO2 bubbles Easy to clean: place the complete diffuser in cleaning solution (JBL PROCLEAN POWER) for 24 hours Package contents: 1 glass diffuser, 1 suction cup with clip
£ 13.19
free delivery
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FZONE Inline CO2 Diffuser for Aquarium, Fits 12/16mm Hose (12mm ID) | Up to 70% CO₂ Efficiency, Durable Aluminum, Space-Saving External Design, Even CO₂ Distribution for Plant Fish Tank
High Efficiency, Up To 70% Dissolution: The inline CO2 inline diffuser creates an ultra-fine mist of CO2 bubbles, achieving superior dissolution rates for lush planted aquariums.
£ 24.99
free delivery
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IAFVKAI CO2 Diffuser Aquarium Glass Spiral CO2 Atomizer Diffuser Bubble Counter Check with Suction Cup for Aquarium Planted Fish Tank Supply Accessories
Notice:Can only be used for carbon dioxide and need to soak for more than 10 hours for the first use, which prevents the product from rupturing due to sudden inflation.It is recommended that the head of the tube be softened with boiling water before intubation Made of high quality glass.Package included:1x Aquarium CO2 diffuser,2x Suction cups.The product belongs to fragile product,We try our best to avoid the breakage.If there is breakage when you receive it, please be careful to avoid being scratched Suitable for fish tank, aquarium, especially aquatic plants, tropical fish to watch and cultivate for fish tank CO2 diffuser can create rich CO2 to provide aquarium plants with the carbon dioxide they need and ensure the nutrition and health of hydrophytes The cylindrical shape and smooth lines contribute to slowing down water speed to help dissolve CO2 effectively
£ 10.99
free delivery
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Clscea DC500-20 Acrylic CO2 Diffuser with Integrated Bubble Counting Function & Replaceable Ceramic Disc for Planted Tanks, 20cm (S)
The unique S-shaped hook design includes a check valve with a quick-plug interface: it is easy to hang on the cylinder wall, which is simple and beautiful, more convenient to install and disassemble, and can also prevent water from flowing back.
£ 13.99
free delivery
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JBL PROFLORA CO2 TAIFUN SPIRAL 5, CO2 reactor, for freshwater aquariums , including hose,transparent / black,200 l
Expandable CO2 reactor for healthy plant growth in freshwater aquariums from 40 to 200 litres from 12 cm height, lossless enrichment with carbon dioxide Operation without additional pump, no separate bubble counter required, easy to clean, completely dismountable, expandable Easy installation by connecting the reactor with special CO2 hose to CO2 fertiliser system (system not included) Collection cap against CO2 loss, robust Makrolon, up to max. 200 litres at 4 KH, up to 100 litres at 10 KH Box contents: 1x JBL CO2 reactor, JBL Proflora CO2 TAIFUN SPIRAL 5, with 5 modules and base module, collection cap at the top, 2 clamps, suction cups, 2 m hose, height: 11 cm, item no. 6468400
£ 12.79
free delivery
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4L Aquarium CO2 Generator Kit, Aquarium Plants Stainless Steel CO2 Cylinder | CO2 Generator Carbon Dioxide Reactor Kit Includes Solenoid Valve, Bubble Counter and Diffuser, for Healthy Planted Aquariums
Visual Bubble, for Various Planted Tanks: This aquarium CO2 generator features a bubble counter with a transparent viewing window, allowing for clear, real-time observation of the CO2 bubble rate.
£ 75.89
free delivery
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Clscea Acrylic CO2 Diffuser with Integrated Bubble Counter for Aquarium Plants (S)
High-quality material: Our aquarium co2 diffusers are made of acrylic, which are as transparent as glass when placed in water, but they are not easily shattered and has high flexibility. Built-in bubble counter.
£ 13.99
free delivery
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CO2 Diffuser Stainless Steel CO2 Atomizer Bubble Counter with U-Shape Connecting Tube for Aquarium Plants Water Grass(40cm)
【Easy Installation】The co2 diffuser aquarium is easy and convenient to install and use by just hanging it besides the tank, every can install it easily without instruction.Package Included: 1 x CO2 Diffuser Or 1 x Atomizing Nozzle 【High Quality】The co2 diffuser aquarium is made of high-grade material, which is non-toxic, safe, energy-saving, eco-friendly and strong.
£ 13.37
free delivery
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DONGKER CO2 Diffuser,Acrylic Hanging CO2 Atomizer With Suction Cups & Bubble Counting Function for 4mm/0.16" I.D. CO2 Tube
Note: Acrylic CO2 Atomizer needs to be selected according to the size and height of the aquarium, it is suitable for large and medium-sized aquariums, and the CO2 Atomizer needs to be connected to the CO2 system.
£ 12.99
free delivery
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DONGKER Aquarium Neo CO2 Diffuser, Acrylic Nano Fish Tank Atomizer Diffuser with Suction Cup for Mini Aquarium Plants Fish Tank (Up to 30cm Fish Tank)
【High Quality】High-transparency acrylic material, beautiful, crystal clear and sturdy, mini, small and exquisite, does not take up space in the fish tank 【Excellent Dissolved Rate】The finer and more stable nano-ceramic material is used to make the passing CO2 bubbles more uniform.
£ 12.99
free delivery
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FZONE Inline CO2 Diffuser for Canister Filter, Fits 16/22mm（16mm ID) Hose | Up to 70% CO₂ Efficiency, Durable Aluminum, Space-Saving External Design, Even CO₂ Distribution for Plant Fish Tank
High Efficiency, Up To 70% Dissolution: The inline CO2 inline diffuser creates an ultra-fine mist of CO2 bubbles, achieving superior dissolution rates for lush planted aquariums.
£ 26.99
free delivery
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boxtech Aquarium Nano Air Stone, Fish Tank Ultra Silent Nano Bubble Stone for Oxygenation, used in Aquarium Fish Tank (Hose and Air Pump not included)
【Creates silently small dense bubbles】 This aquarium bubble stone can silently create a very dense cloud of small bubbles.
£ 9.99
free delivery
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20% discount
Aquarium CO2 Atomizer, Fish Tank Atomizer Outer‑Tank CO2 Diffuser CO2 Reactor Diffuser Fish Tank Accessory(M1 12/16mm)
【Eco-friendly】 The use of reserve penetration technology to diffuse CO2 can increase the dissolution effect and save the use of CO2, which is more environmentally friendly. 【Kindly Note】 The external atomizer will make a slight "squeaking" sound during use.
£ 20.35
£ 25.44
To the offer
Fdit CO2 Atomizer Stainless Steel Long Straight Tunnel Carbon Dioxide Diffuser Atomiser for Aquarium Plants Marine Fish Tanks (250 mm)
[High-quality Material] : This co2 diffuser is made of premium stainless steel material, rustproof and sturdy, providing durability and longevity, while featuring safe, and eco-friendly attributes, safe to use. [Excellent Dissolved Rate] : Also come out with an excellent dissolution rate and produces an excellent effect for the aquarium.
£ 15.93
free delivery
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Clscea Aquarium CO2 Diffuser Ceramic Replacement, Normal L
Note: This product is an original replacement for Clscea diffuser and it is not suitable for other brands of products.
£ 8.99
free delivery
To the offer
10% discount
Clscea Aquarium CO2 System Generator 2.4L, Stainless Steel Carbon Dioxide Reactor Kit with Regulator Solenoid Valve for Aquarium Plants (G600S)
【Real capacity rejects false standard】Our product parameters all have safety margins. The actual CO2 capacity is clearly indicated.
£ 89.99
£ 99.99
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DONGKER CO2 Diffuser,Acrylic Hanging CO2 Atomizer With Suction Cups & Bubble Counting Function for 4mm/0.16" I.D. CO2 Tube
Note: Acrylic CO2 Atomizer needs to be selected according to the size and height of the aquarium, it is suitable for large and medium-sized aquariums, and the CO2 Atomizer needs to be connected to the CO2 system.
£ 13.99
free delivery
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6% discount
Aquarium Co2 Diffuser Stainless Steel Ceramic Disk, 250Mm | Carbon Dioxide Reactor For Planted Tank, Fine Mist Generator, Ceramic Membrane Diffuser For Aquarium Fish Tank, Silver
[250MM TANK USE] Designed with a 250mm tube body this aquarium CO2 diffuser suits planted fish tank setups and helps distribute carbon dioxide smoothly to support a lively aquatic display. [CERAMIC DISC MIST] The ceramic disc creates clear precise carbon dioxide bubbles with an excellent dissolved rate helping improve diffusion performance while adding a refined visual effect in water. [STAINLESS STEEL BUILD] Made of stainless steel this diffuser offers a durable and safe structure that supports long term aquarium use while maintaining a simple clean look in the tank. [EASY INSTALL SETUP] Built for easy use and installation this CO2 atomizer helps simplify aquarium equipment setup making it suitable for hobbyists who want a convenient and enjoyable experience. [SAFE ENERGY SAVING] Featuring a safety focused and energy saving design this aquarium diffuser supports efficient daily operation and helps create a dependable environment for fish and aquatic plants.
£ 12.45
£ 13.31
To the offer
CO2 Diffuser Aquarium 25 cm - myScape Stainless Steel Ceramic Membrane | for CO2 systems, stainless steel diffuser with ceramic plate, for 4/6 mm tubing, fine bubbles, planted aquarium, freshwater
Stainless steel CO2 diffuser for freshwater – The ARKA mySCAPE-CO2 diffuser introduces CO2 precisely into planted aquariums and fits many standard CO2 systems.
£ 24.90
free delivery
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JBL PROFLORA CO2 TAIFUN GLASS MINI
Beautifully shaped small, very effective, glass diffuser for dissolving CO2 in aquarium water, for perfect plant growth Installation: connect diffuser to CO2-carrying hose (4/6) and attach it near the bottom to the pane with a suction cup Even CO2 outflow & effective distribution: special ceramic for particularly small CO2 bubbles Easy to clean: place the complete diffuser in cleaning solution (JBL PROCLEAN POWER) for 24 hours Package contents: 1 glass diffuser, 1 suction cup with clip
£ 12.94
free delivery
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Tropica 3-in-1 CO2 Diffuser, Check Valve & Bubble Counter
Tropica 3-in-1 CO2 Diffuser, Check Valve & Bubble Counter Facilitates accurate CO2 dosage Customised ceramic disc ensures the creation of micro bubbles Increases the CO2 utilisation as opposed to a regular air stone Reflux valve prevents the fish tank’s water from being sucked in backwards
£ 15.99
free delivery
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CO2 Diffuser,Acrylic Fish Tank Atomizer Carbon Dioxide Bubbles With Check Valve & Suction Cups for Aquariums Up to 120 CM
Acrylic Material:Made of high-quality and highly transparent acrylic material not affect the landscape inside the fish tank.
£ 11.99
free delivery
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Ejoyous CO2 Diffuser Aquarium, Stainless Steel CO2 Atomizer Bubble Counter Fish tank Atomizer CO2 Diffuser, for Aquarium Plants Planted Water Grass CO2 System (M) 250mm
【Excellent Dissolved Rate and Effective Results】Achieve an excellent dissolved rate and produce remarkable effects for your aquarium with this CO2 diffuser.
£ 13.54
free delivery
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9% discount
Alnicov CO2 Diffuser Glass Refiner Spiral CO2 Diffuser with Stop Valve for Aquarium Fish Tank
Effective CO2 atomisation by ceramic membrane for smaller, finer, smoother and more evenly dispersed CO2 bubbles.
£ 9.99
£ 10.99
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LINLAN Aquarium Inline CO2 Diffuser, Low/Medium Flow, for 16mm ID Hose | external filter hose mounting, ultra-fine CO2 mist, center ceramic disc, view window, built-in check valve, no tank space
【Essential for Low/Medium Flow Systems】Engineered to optimize common filter flow rates.
£ 24.99
free delivery
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Joyzan Aquarium Co₂ Diffuser, Plastic Black Carbon Dioxide Refiner with Co2 Atomizer System Installation Kit Bubble Counter Diffuser for Plants Water Grass Dispersion Use in Within 40‑120cm
Highly Efficient CO2 Dissolution: Designed specifically for aquarium plants, this suction cup co2 diffuser significantly improves co2 dissolution, ensuring aquatic plants receive ample nutrients for photosynthesis.Using this aquatic plant growth co2 diffuser results in more vigorous plant growth, a more thriving underwater ecosystem, and a healthier and more aesthetically pleasing aquarium overall Built in Anti Backflow Protection: You need not worry about backflow disrupting the stable supply of co2; this silent operation co2 aquarium diffuser features a reliable built-in anti-backflow mechanism that effectively prevents water from flowing back, ensuring a safe and continuous gas output.
£ 11.99
free delivery
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DONGKER External Inline CO2 Diffuser Atomizer, 16mm Aquarium Atomiser Reactor Aluminum Alloy for Planted Aquarium Canister Filter
Rotary Adjustment: There Are Two Connection Methods of Water and Vertical, Which Can Meet Different Needs and Will Not Affect Normal Use.
£ 20.99
free delivery
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JBL PROFLORA CO2 TAIFUN INLINE 16/22, CO2 diffuser, integrated bubble counter and backflow protection, for 160-600 l aquariums
Bubble counter, for checking the amount of CO2 added, is integrated.
£ 31.14
free delivery
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2L Aquarium CO2 Generator Kit, Aquarium Plants Stainless Steel CO2 Cylinder | CO2 Generator Carbon Dioxide Reactor Kit Includes Solenoid Valve, Bubble Counter and Diffuser, for Healthy Planted Aquariums
Visual Bubble, for Various Planted Tanks: This aquarium CO2 generator features a bubble counter with a transparent viewing window, allowing for clear, real-time observation of the CO2 bubble rate.
£ 63.89
free delivery
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7% discount
MiOYOOW CO2 Diffuser, Acrylic Aquarium CO2 Atomizer with Integrated Bubble Counter for Aquarium Plant Tank Fish Tank
Hanging: The CO2 atomizer has a U-shaped hook connection pipe, and the suction cup on the outer wall of the tank is fixed and easy to adjust.
£ 14.99
£ 16.09
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WEAVERBIRD U-Shaped Aquarium Tube, Fish Tank Glass U Shape CO2 Diffuser | Aquarium Airline Tubing Connectors for Tank Air Tube for 4mm I.D. Air Line Hose Aquarium Pumps and Filter Accessories
Stable and durable: U shape pipe made of high quality glass, looks crystal clear, durable and beautiful.
£ 6.99
free delivery
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LINLAN 25cm 304 Stainless Steel CO₂ Diffuser, Frosted Matte Material(One-Piece Molding), Equipped with Silicone Suction Cup + Replacement Diffusion Disc, Suitable for Rimless Planted Aquariums
304 Stainless Steel: Crafted from premium 304 stainless steel – shock-resistant, non-deformable and durable.
£ 14.99
free delivery
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LINLAN CO2 Bubble Counter with Check Valve, Hose Connection | co2 stays on, low-maintenance, durable, leak-resistant, for planted aquariums
【Simple & Dependable】Dependable CO2 bubble counting without the complexity.
£ 7.49
free delivery
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Dennerle Co2 Diffusor Ultra L
Compact and stylish CO2 diffuser for aquariums Diffusion regulation thanks to the integrated bubble counter Also suitable for bio CO2 systems Made of transparent acrylic material, high quality For 4/6 mm pipe
£ 17.89
free delivery
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hygger Air Stone for Fish Tank, Aquarium Air Stones Nano Oxygen Diffuser, Air Bubbler Stone Square Sahped Red Oxygen Aerator with Air Tube Check Valve Air Flow Valve T Connector Suction Cup
【Reliable Material】: The fish tank air stone is made of mineral material and sintered at high temperature.The quiet air stone features evenly distributed air holes, anti-clogging, producing mist-like ultra-fine bubbles, and causes no effect to the health of your aquatics 【High Dissolved Oxygen Rate】: The aquarium air stone uses advanced micro-pressure technology to emit more denser bubbles, and the bubble size can be adjusted by control vale, and the different oxygenation amount can satisfy different use requirements.
£ 15.99
free delivery
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Nikou CO2 Atomizer, Carbon Dioxide Diffuser Fish Tank Supplies Atomizing Tube Reactor Diffuser Aquarium Equipment Increase the Dissolution Effect (12/16mm)
Purpose: The design of the secure nut locking system can effectively lock the carbon dioxide tube and water pipe to prevent loosening.
£ 17.09
free delivery
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Clscea Stainless Steel CO2 Diffuser Ceramic Replacement, High Pressure L
Note: This product is an original replacement for Clscea diffuser and it is not suitable for other brands of products.
£ 9.99
free delivery
To the offer
Finest-Filters CO₂ External Atomizer Diffuser for Planted Aquariums – High-Efficiency Inline CO2 Dissolution – Compatible with Canister Filter Outflow Tubing – 12/16mm or 16/22mm Options (16/22mm)
Efficient CO2 Diffusion – Produces ultra-fine microbubbles for maximum CO2 absorption in planted tanks
£ 25.99
free delivery
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Clscea Stainless Steel CO2 Diffuser Ceramic Replacement, High pressure S
Note: This product is an original replacement for Clscea diffuser and it is not suitable for other brands of products.
£ 9.59
free delivery
To the offer
JBL PROFLORA CO2 TAIFUN GLASS MIDI, CO2 diffuser, for freshwater aquariums from 40-300 l, made of glass
Small glass diffuser for freshwater aquariums of 40-300 l, effective dissolution of CO2 in aquarium water for optimal plant growth Special ceramic for particularly small CO2 bubbles, uniform CO2 outflow, effective distribution Easy installation by connecting the diffuser to the CO2 hose (4/6) and then attaching it to the glass with the suction cup near the ground Easy cleaning by immersing the entire diffuser in cleaning solution (e.g. JBL PROCLEAN POWER) for 24 hours Box contents - 1x JBL CO2 diffuser, JBL PROFLORA CO2 TAIFUN GLASS MIDI, incl. suction cup with clip, diffuser material glass, art.
£ 11.59
free delivery
To the offer
7% discount
Dennerle Co2 Diffusor Ultra M
Compact and stylish CO2 diffuser for aquariums Diffusion regulation thanks to the integrated bubble counter Also suitable for bio CO2 systems Made of transparent acrylic material, high quality For 4/6 mm pipe
£ 16.99
£ 18.18
To the offer
MiOYOOW Aquarium CO2 Diffuser, Fish Tank Atomizer with Strong Suction Cup Acrylic Carbon Dioxide Refiner for Planted Fish Tank Aquarium
MiOYOOW
£ 11.99
free delivery
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EMSea 2PCS 20mm Aquarium CO2 Diffuser Ceramic Disc Replacement CO2 Slice Carbon Dioxide Reactor Bubble Refine Slice Aquariums Accessories
Material: High-density silicone sealing ring, not easy to block. An indispensable item for a fish tank or aquarium, durable and reliable.
£ 8.49
free delivery
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Yosoo U-shaped DIY of 4 in 1 Co2 diffuser for DIY Co2 system check valve bubble counter planted Aquarium
4 IN 1 FUNCTION: It is a 4 in 1 high performance CO2 diffuser for DIY CO2 system (1-2 Bar) and compressed CO2 system, for up to 300L aquarium
£ 8.31
free delivery
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DONGKER External CO2 Diffuser, Aluminum Alloy Fish Tank CO2 Atomizer With Locking Nut & Non-Return Valve for 12mm/16mm I.D. Hose
High Dissolution Rate: External CO2 Diffuser has delicate diffusion effect and produces tiny bubbles, the transparent observation compartment can observe the refining effect and improve the dissolution rate of CO2 in the aquarium water.
£ 19.99
free delivery
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Upgraded 2L/5L Aquarium CO2 Generator System with Timer-Enabled Motor Valve, Upgrade CO2 System Kit with Quick-Release Structure for Aquarium Plants Tanks (2L)
Notices before purchase: (1) The motorized valve may emit a soft sound during ignition/disabling — this is normal and not a defect. It works silently during normal operation; (2) Soak the diffuser in your aquarium for 24 hours before use.
£ 92.87
free delivery
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Fzone 2.5 L Aquarium CO2 System Generator Kit for Aquarium Plants Tanks | Easy-to-Refill, Stable CO₂ Output, Safe Reliable, Complete Kit, Regulator, CO₂ Diffuser, CO₂ Tubing and 12V DC Solenoid
Professional DIY Kit. A complete system in 2.5L size bottle, that includes SUS304 stainless bottle, regulator, precision needle valve, and easy adjustable bubble counter Safe.
£ 99.00
free delivery
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Fafeims CO2 Diffuser, 20-40cm Adjustable Aquarium Atomizer for Planted Tank, High Dissolution Bubble Generator for Fish Tank (L Yaguang Large Cup 400)
[Easy Installation] Setting up this co2 diffuser is a breeze thanks to its installation process.
£ 11.00
free delivery
To the offer
13% discount
Sarini 2Pcs CO2 Generator, Carbon Dioxide Reactor Fish Tank DIY Quick Twist Bottle Cap Air Diffuser Generator Part
The reaction bottle cap can be used with any soda/water bottle from the brine shrimp hatchery.
£ 6.99
£ 7.99
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Nikou Check Valve, 2Pcs Stainless Steel One Way Air Valve for Anti-Backflow Non-Return Air CO2 Line Tubing Regulator Diffuser in Aquarium System Fish Tank Accessories
Keep Service Life: The Pneumatic Check Valve can prevent the aquarium from water flowing back, which is caused by the decrease, and keep the function of carbon dioxide bottle One Way Flow: When used in the Ozone generator, air check valve can prevent the Ozone from flowing back to the air pump and eroding the propeller Function Well: Aquarium non return check valve can protect the power head from the water flowing back which is caused by power cut Easy Operation: Single check valve is easy to install, requires no additional tools and can be attached to any place you like in seconds Application: Stainless Steel One Way Check Valves are suitable for CO2 supply system in fish tank, aquarium and air pump system
£ 8.29
free delivery
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Clscea Aquarium CO2 Regulator Dual Gauge with Bubble Counter and Solenoid Valve, Side-Opening Radial Solenoid W21.8 CO2 Regulator for Aquarium
Dual-gauge design: Our dual-gauge configuration allows for clear readability of both input and output pressures.
£ 52.99
free delivery
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Tiardey 2Pcs Check Valve Stainless Steel One Way Non-Return Check Valve for Aquarium Co2 System Aquarium CO2 Diffuser
Single check valve is lightweight, portable and space saving - It is easy to install, requires no additional tools and can be attached to any place you like in seconds.
£ 6.99
free delivery
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Fish Tank Diffuser, Stainless Steel Carbon Dioxide Diffuser CO2 Diffuser Atomiser Fish Tank Supplies Aquarium Equipment(M (250mm))
Made of high-grade material, which is non-toxic, safe, energy-saving and eco-friendly Provides precise and clear carbon dioxide bubbles Simple design, the best safety performance Easy and convenient to use and install Also come out with excellent dissolved rate and produces excellent effect for the aquarium
£ 12.20
free delivery
To the offer
Stainless Steel CO2 Diffuser Atomiser for Aquarium, Fish Tank Carbon Dioxide Reactor, Fine Bubble Atomizer for Aquatic Plants
Tonysa
£ 12.19
free delivery
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DONGKER Aquarium CO2 Refiner Diffuser,304 Stainless Steel Hooked CO2 Diffuser with Check Valve for Aquarium Plant Tank
High Dissolution Rate: Uniform and delicate bubble, high dissolution rate of water, upgraded refinement module without rubber ring design, easy to unscrew, easy and quick to replace.
£ 16.99
free delivery
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LINLAN Aquarium Inline CO2 Diffuser, for High Flow, Fits 12mm ID Hose | external filter hose mounting, ultra-fine CO2 mist, side ceramic disc, built-in check valve, no tank space, for aquarium
【Essential for High Flow Systems】Features a side-mounted ceramic disc with a large internal chamber.
£ 15.99
free delivery
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9% discount
DONGKER Aquarium CO2 Diffuser, Aquarium CO2 Regulator,12/16mm CO2 Art Inline for Aquarium Planted Fish Tank
Note: 1. This atomizer adopts high-density ceramic atomizing tube, which needs to be soaked in water for 24-48 hours to achieve the atomization effect.
£ 19.99
£ 21.99
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JBL PROFLORA CO2 TAIFUN INLINE MEMBRANE, Replacement for JBL PROFLORA CO2 TAIFUN INLINE & Direct, 1 Piece
Efficient replacement membrane for the CO2 inline diffuser JBL PROFLORA CO2 TAIFUN INLINE (12/16, 16/22, 19/25) and the forerunner JBL PROFLORA Direct Special ceramics for particularly efficient CO2 diffusion and the smallest CO2 bubbles for maximum effectiveness Simple installation by switching off the filter, screwing on the diffuser, inserting the watered membrane and finally screwing the diffuser together again As the diffusors' ability to diffuse due to usage decreases, an annual replacement of the membrane is recommended POTABLE WATER FILTER JBL PROFLORA CO2 TAIFUN INLINE MEMBRANE Model Number : 6469000 From : JBL
£ 13.29
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boxtech Aquarium Nano Bubble Air Stone Kit, Quiet oxygen fish tank | With control valve, for dissolved oxygen, super tiny bubbles, for aquarium and hydroponics (35mm)
【Creates silently small dense bubbles】 This aquarium bubble stone can silently create a very dense cloud of small bubbles.
£ 9.99
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CO2 Diffuser Aquarium 30 cm - myScape Stainless Steel Ceramic Membrane | for aquascaping & planted tanks, stainless steel CO2 diffuser, 4/6 mm tubing, ceramic membrane, CO2 accessory, freshwater
Stainless steel CO2 diffuser for planted tanks – ARKA mySCAPE suits precise CO2 introduction in freshwater aquariums and fits many standard CO2 systems.
£ 27.60
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hygger Aquarium Bubble Curtain Wall, Fish Tank Air Bubbler Quiet High Dissolved Oxygen Diffuser Aquarium Air Stone with Air Tubing for Freshwater Saltwater (15cm)
Fantastic Bubble Curtain: The bubbles produced by our aquarium bubble strip are smaller and denser, like the atomization effect, with a stunning appearance; the bubbles rise evenly and slowly, which can effectively enhance the vitality of the fish, make your fish healthy and happy, and add a touch of beauty to the fish tank Plentiful Fine Bubbles : The aquarium bubble curtain adopts advanced micro-pressure technology to produce rich and fine bubbles, continuously release oxygen into the water, there by increasing the oxygen content in the water, improving water circulation, making aquatic organisms more active, and providing a healthier environment for aquatic organisms Durable Mmaterial: Aquarium air stone diffuser is made of high-quality PVC and ABS materials, which is durable and not easy to clog.
£ 15.99
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UNS Pro Inline CO2 Diffuser - Aluminum, High Gas Dissolution Diffuser for Freshwater Aquarium - Aquascaping Tank Ext. Canister Filter Accessory for 25/32in, 13/16in or 20ID Tubing - Space Gray, 20mm
Keep Your Aquascape Clean – Installs outside the aquarium on your filter’s return line, removing the need for bulky in-tank diffusers Aluminum Build in Space Gray – Corrosion-resistant and built to last, this sleek diffuser adds a professional touch to any planted tank setup No Flow Restriction Design – Innovative side-mounted ceramic plate allows strong water flow and efficient CO2 diffusion without clogging output Available in 3 Sizes – Choose from 12mm, 16mm, or 20mm models to fit your canister filter setup, including UNS Delta and Blitz filters Easy Maintenance & Replacement – Access the ceramic plate easily for routine cleaning or replacement without disconnecting your full system
£ 50.40
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IAFVKAI 2x Glass U Shape Tube for Aquarium Air Pump Fish Tank Aquarium CO2 Diffuser Connect Tube
Package Includes:2 x U-Shape Connectors.
£ 8.99
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Voyoo Aquarium Inline CO2 Diffuser, Compatible with 16/22mm Filter Hoses
70% HIGHLY EFFICIENT CO2 DIFFUSTION The inline CO2 diffuser effectively dissolves CO2 into the water flow, producing fine mist bubbles that maximize resolution and improve plant uptake.
£ 22.99
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5% discount
JBL PROFLORA CO2 TAIFUN INLINE 12/16, CO2 diffuser, integrated bubble counter and backflow protection, for 40 - 300 l aquariums
Bubble counter, for checking the amount of CO2 added, is integrated.
£ 25.29
£ 26.62
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boxtech Fish Tank Air Stone Kit, Oxygen Nano Bubble Stone | for Silent Oxygen Diffuser for Fish, Shrimp and Hydroponic Plants (50 mm, Accessories Included)
Product Specification: 50 mm aquarium air stone x 1, suitable for 20-80 cm aquariums (air pump and air hose not included).
£ 9.99
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IAFVKAI 2x Acrylic U Shape Tube for Aquarium Air Pump Fish Tank Aquarium CO2 Diffuser Connect Tube
Package Includes: 2 x U-Shape Connectors.
£ 8.99
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Pssopp Aquarium CO2 Diffuser Acrylic Carbon Dioxide Bubble Counter Fish Tank Air Refiner CO2 Bubble Diffuser with Suction Cup(L)
Pssopp
£ 12.99
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CO2 Diffuser Ceramic Spare Plate - myScape Diffuser Disc Accessory | for ARKA stainless steel diffusers, ceramic diffuser plate, fine bubbles, easy replacement, planted aquarium, freshwater
Ceramic replacement plate for CO2 diffusers – The ARKA mySCAPE-CO2 replacement plate is made for ARKA stainless steel diffusers and distributes CO2 finely and evenly in the freshwater aquarium.
£ 11.81
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ISTA CO2 diffuser Corner Fits suction cup 4/6mm air line tube- aquarium Solenoid
Aquarium Equip
£ 7.49
free delivery
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freneci 10PCS Round Aquarium CO2 Diffuser Replacement Ceramic Disc CO2-3cm
freneci
£ 13.60
free delivery
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ISTA Ceramic CO2 Diffuser 20mm silicon suction cup - aquarium plants Atomizer Reactor
ISTA
£ 11.54
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12/16mm CO2 Reactor Diffuser, RO Tech, Secure Lock | Efficient RO dissolving, Reduces gas waste, Leak-proof nut lock, For planted aquariums, Ideal for aquascapers
CONVENIENT, WITH EASY INSTALLATION – Easy and convenient to use and install.
£ 19.56
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boxtech Aquarium Air Stone Set, | Sand Plate Aquarium Diffuser for Dissolved Oxygen Aerator Stone（S- 80 MM）
【Product Specification】 80mm bubble stone * 1,Control Valve * 1, Suction Cups * 1, T-Shaped Connector * 1 and Airline Tube * 1. 【Notice: air pump is not included】 【Choose for Tank and Air pump wattage】Recommended air pump power: 2w-5w, for 5 - 30 gallon freshwater and saltwater tanks.
£ 16.99
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MiOYOOW Inline CO2 Diffuser, Aquarium Carbon Dioxide External Atomizer Bubble Counter Reactor Built-in Check Valve for Planted Aquariums Tanks (12/16mm)
External Installation: The external CO2 diffuser for aquariums and planted tanks saves interior tank space, maintains unobstructed visibility, and simplifies maintenance.
£ 18.99
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Finest-Filters Ista Waterplant CO2 Diffuser Set System Growing Live Fish Tank Aquarium Plants CO2 For Plant Growth
Ista CO2 starter set supply kit.
£ 15.99
free delivery
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DONGKER CO2 Bubble Counter,Aluminum Alloy Non-Return Aquarium CO2 Regulator Single Head for Most CO2 Systems
Materials: This product is made of aluminum alloy joint and high transparent acrylic material, which is strong and sturdy, anti-corrosion, stable and reliable, with long service life.
£ 9.99
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Boxtech Nano Air Stone 80mm for 30-70Gal | Ultra-high dissolved oxygen diffuser with nano bubbles, ideal for hydroponics and aquariums.
【Air Pump Accessories】 Includes a 3.2 inch Nano Air Disk Stone, 1 Control Valve, 2 Suction Cups, 1 T-Shaped Connector and a 40 Inch Airline Tubing.
£ 16.99
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CO2 Atomiser Stainless Steel, Long Straight Tunnel Diffuser | Ultra-fine bubble mist for enhanced plant absorption, fits 12/16mm tubing, keeps water clear without large bubbles, suitable
[Ultra-Fine Bubble] Produces micro-bubbles as small as 0.1mm for maximum CO2 dissolution, keeping tank water crystal clear without large splashing bubbles, ideal for densely planted aquascapes and shrimp breeding tanks. [High-Grade Stainless Steel] Crafted from resistant 300mm stainless steel body with 2.3cm ceramic diffusion disc, resists rust and mineral buildup even in high-humidity tank environments, suitable for both freshwater plant setups and marine aquariums. [Easy Installation] Connects directly to standard 12/16mm CO2 tubing with simple push-fit design, no tools or sealant required for setup, works perfectly with most pressurised CO2 systems and solenoid valve regulators. [Long-Lasting Performance] Precision-engineered straight tunnel design ensures even gas distribution across the full 30cm length, prevents clogging from or debris, maintains consistent bubble output for 6-12 months between cleaning cycles. [Versatile Application] Enhances plant growth and pearling effect in aquascaped nano tanks, medium-sized planted aquariums, or high-tech CO2-injected systems, compatible with external canister filters and inline diffuser setups.
£ 19.21
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HEEPDD Aquarium CO2 Diffuser, CO2 Atomizer Aluminium Alloy Fish Tank Supplies for CO2 Aquarium Systems (silver)
Easy installation with secure suction cup design for quick mounting on any glass surface.
£ 8.54
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Finest-Filters CO₂ External Atomizer Diffuser for Planted Aquariums – High-Efficiency Inline CO2 Dissolution – Compatible with Canister Filter Outflow Tubing – 12/16mm or 16/22mm Options (12/16mm)
Efficient CO2 Diffusion – Produces ultra-fine microbubbles for maximum CO2 absorption in planted tanks
£ 23.99
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Fish Tank CO2 Diffuser with Suction Cup Water Plants Refiner Atomizer Transparent Acrylic Aquarium Carbon Dioxide Bubble Counter(L, M, S)(L)
difusor c02. 【Transparent Acrylic Bubble Counter】This CO2 bubble counter is made of highly transparent acrylic, which can easily observe the output of carbon dioxide, which is convenient, practical and beautiful. bubble fish.
£ 13.43
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Hsthe Sea Aquarium CO2 Generator System Kit with Pressure Gauge, DIY Aquarium Planted Tank CO2 System Pro Tube Valve Gauge Bottle Hat Kit CO2 Regulator Aquarium for CO2 Diffuser Grow System
Made of metal material with a locking pipe device to ensure ndeformation, , nslip when working.
£ 19.99
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JBL PROFLORA CO2 TAIFUN GLASS MIDI
Beautifully shaped, small, but very effective glass diffuser for dissolving CO2 in the aquarium water, for perfect plant growth.
£ 21.62
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Fish Tank CO2 Bubble Counter, CO2 Diffuser Aquarium Glass Spiral CO2 Atomizer Diffuser Bubble Counter with Suction Cup for Aquarium Planted Fish Tank
【Carbon Dioxide Bubble Counter】With high transmittance, our CO2 valve is convenient for you to obsere CO2 output quantity. 【Suction Cup】Our fish tank CO2 bubble counter is equipped with suction cup, fixed firmly, not easy to slip, convenient to use. 【High Quality Material】Our CO2 bubble counter is made of high transparent crystal glass, acid and alkali resistance, co2 counter 【Fine Workmanship】Using grinding tool, one time molding, avoid manual manufacture error.
£ 9.21
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IAFVKAI 2 PCS Glass U Shape Tube for Aquarium Air Pump Fish Tank Aquarium CO2 Diffuser Connect Tube
Package Includes:2 x U-Shape Connectors.
£ 8.99
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M2 16/22mm External CO2 Bubble Atomizer Atomizing Tube Diffuser External Reactor Aquarium Fish Tank For Freshwater Aquarium Fish Tank Plant
External CO2 Inline Diffuser: Finest atomization due to optimized ceramic plates outside the aquarium.
£ 23.99
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Aquarium CO2 Diffuser Stainless Steel 250mm Size M | Stainless Steel Construction, Planted Tank Use, Aquatic Plant Equipment, Fish Tank Compatibility, 250mm Size
Good performance: This CO2 diffuser is made of high-quality stainless steel and therefore cannot be easily broken or damaged, but is easy to clean.
£ 10.29
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M METERXITY 2-Pack CO2 Check Valve Aquarium Stainless Steel | One Way Check Valve Non-Return, for Aquarium Co2 System Diffuser, High Power Air Pumps, Fish Tank
[Multipurpose Use] - These aquarium check valve are designed for CO2 supply systems in aquariums and fish tanks.
£ 8.54
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CO2 Drop Checker - Portable CO2 Monitor Kit Drop Checker with 15ml Solution | Long Term Indicator Monitor Tester | Aquarium CO2 Systems CO2 Diffuser For Accurate Fish Tank Monitoring
Hassle-Free Co2 Detection
£ 7.06
£ 7.23
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Boxtech Aquarium Nano Air Stone, Nano Bubble Stone | For dissolved oxygen, ultra-quiet 50 mm silent diffuser
【Product Specification】 50mm nano bubble stone*1, Air pump and air hose not included, suitable for 20-80CM fish tank, the bubble stone is placed below the fish tank 【Ultra-high Dissolved】The air bubbles released by this Fish Tank Nano Bubble Stone are smaller, denser and more uniform, which greatly improves the oxygen dissolution rate in the water and reduces carbon dioxide, allowing your fish to have better breathing 【Ultra-quiet】The noise of operation in the water is very small, will not affect the normal activities of aquatic organisms, and will not affect the sleep of children 【Adjustable】You can change the bubble size by hand, and let the bubble stone back to the water when all the accessories are connected, you can quickly achieve the refining effect 【Easy to Use】 Fish Tank Ultra Silent Nano Bubble Stone can stay well in the fish tank does not move, soak in the fish tank for two hours before using the best
£ 9.99
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LINLAN Modular Easy-Water-Refill CO2 Bubble Counter, Hose Connection | with syringe, refill without disassembly, check valve, co2 stays on, for planted aquariums
【Modular Multi-Module Design】The key upgrade: a modular structure that splits into a standard bubble-counting module and a quick-fill module.
£ 9.99
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Eterspr CO2 Diffuser, U-shaped Glass, Aquarium CO2 Atomiser System, Spiral Thinner, Check Valve, for Plant Growth Support
Material:It is made of high quality high transparent glass material, which is cold and heat resistant, wear-resistant, not easy to break and can be used for a long time.
£ 12.99
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DONGKER Aquarium CO2 Proof Tubing, 5M/16Ft Aquarium Air Line Tubing with 4 Suction Cup for Fish Tank Aquarium
sturdy Quality: PU Material Is Transparent and Has No Peculiar Smell, Smooth and Transparent, Good Flexibility, Tear Resistance.
£ 10.99
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CO2 Atomizer Diffuser, Acrylic Nano CO2 Reactor Diffuser with Suction Cup for Aquarium Planted Fish Tank
Function: CO2 Diffuses Tiny Bubbles Into the Water Through the Atomisation of the Diffuser, Improves the Growing Environment of Aquatic Plants in the Fish Tank, Promotes Photosynthesis of Aquatic Plants and Facilitates the Healthy Growth of Aquatic Plants in the Fish Tank, Comes With A Bubbler.
£ 21.84
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We have found a total of 110 CO2 Diffuser deals for you at amazon, ebay, ONBuy UK, and other shops. The most popular brands are: DONGKER, Clscea, and JBL. Today's offer is CO2 Diffuser Aquarium, Aquarium Atomiser, CO2 Diffuser with Suction Cups and U-Pipe, Carbon Dioxide Diffuser, Glass Tube, Aluminium Alloy Aquarium Bubbler Accessories for Aquarium, Freshwater Fish with 25% discount. The lowest price we found in our deals is £ 6.45 . The highest price in our price comparison is £ 99.00 . Currently, we have selected 5 reliable shops for you to buy CO2 Diffuser affordably.