10 Best inline diffusor in Deutschland

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Last Updated - 28/04/2025

Best Choice

01

Q Grow Innovative Aqua Tools

Q-Grow CO2 Inline Diffuser, CO2 Reactor for Aquarium, High-Quality Stainless Steel, Includes Bubble Counter and Anti-Return Device - 16/12 mm Connection

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9.7

Exceptional

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Main highlights

Save CO2 – thanks to the advanced Q-Grow ceramic technology, CO2 is atomised into the finest bubbles. The result is an extremely high efficiency, saving valuable CO2.
Easy to clean: the replaceable ceramic plate can be cleaned at any time or replaced with a new one. The replacement ceramic in size S (20 mm) is available on the Amazon product page of our J-Pipe diffusers.
Easy installation – cutting the returning 16/12 mm external filter hose and installing the inline CO2 diffuser. Now just connect the CO2 hose. Done!
Comprehensive set – Q-Grow CO2 inline diffuser – 16/12 stainless steel version, 1 x bubble counter including backflow protection, 1 x additional replacement ceramic, 2 x stainless steel hose clamps, 1 x wall mounting set
CO2 inline diffuser made of stainless steel – finest atomisation thanks to optimised ceramic plate outside the aquarium. The result is a diffuser-free aquarium that directs the view away from technology and puts the plants and fish in the foreground.

49,95 €
02

U.P. Aqua

UP Aqua Inline Atomizer 17 mm (Hose Size 16/22) CO2 Reactor for Freshwater and Saltwater Aquariums, Ideal for Plant Aquariums and Aquascapes from Nano to Large Aquariums, Operation with Filter Pump

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9.6

Exceptional

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Main highlights

Suitable for almost all pool sizes: from nano to large aquariums
Silent thanks to the special membrane, the CO2 is emitted almost silently, no annoying chirping
Please note: for the in-line atomizer to work properly, a working pressure of at least 1.8 bar is required. Pressure reducers or CO2 systems with fixed working pressure usually 1.5 bar often do not provide enough pressure for optimal operation of the inline atomiser.
Ideal for aquascaping and plant aquariums, inconspicuous placement on the filter, for example in the aquarium cabinet instead of ordinary diffusers in the aquarium
Finest atomisation thanks to built-in special membrane

39,90 €
03

JBL

JBL PROFLORA CO2 TAIFUN INLINE 16/22, CO2 Diffuser, Integrated Bubble Counter and Backflow Protection, for 160-600 L Aquariums

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9.4

Excellent

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Main highlights

With integrated bubble counter for CO2 addition control and water return protection to protect the technology
Particularly effective membrane for high CO2 savings of up to 20 percent
High-performance CO2 diffuser for installation in filter return hose from the external filter, efficient CO2 enrichment for optimal plant growth
Easy installation by disconnecting the returning outer filter hose, watering and installing the diffuser and final CO2 connection
Box contents: 1x JBL CO2 diffuser, JBL Proflora CO2 TAIFUN INLINE 16/22, incl. wall mount, suction cup and screw mounting, item no. 6468800

25,63 €
04

AQUAGEAR

AQUAGEAR Chihiros External Diffuser Aquarium Inline CO2 Reactor CO2 Diffuser Similar to UP-Aqua Inline Atomizer (Hose Size 12/16)

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9.3

Excellent

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Main highlights

Space-saving design: Thanks to its compact design, the inline CO2 reactor takes up little space and can be stored discreetly in the base cabinet of the aquarium.
Optimal plant growth: the use of the Chihiros external diffuser ensures an even CO2 supply throughout the aquarium, resulting in a lush and healthy plant growth.
High-performance CO2 diffuser/CO2 reactor for installation in the filter circuit. It is very similar to the classic UP-Aqua inline atomizer, but more chic in construction.
High efficiency: Thanks to the special design of the diffuser, CO2 is efficiently dissolved in the water, which means less CO2 is wasted and the plants can absorb the CO2 they need optimally.
Efficient CO2 diffusion: the Chihiros external diffuser, also known as inline CO2 reactor, ensures optimal enrichment of the aquarium water with CO2. This promotes the growth of aquatic plants and ensures a healthy aquarium.
Easy maintenance: The maintenance and cleaning of the inline CO2 reactor is straightforward as it is easily accessible and can be dismantled without much effort.
Easy installation: this inline CO2 reactor can be easily integrated into the filter circuit of the aquarium. It simply connects to the external filter and requires no additional brackets or fixings.
Compatibility: The Chihiros external diffuser is compatible with most external filters and is suitable for different aquarium sizes. From Nano to the 600L aquarium, it has been successfully tested, but can probably also supply larger aquariums.

34,99 €
Value for Money

05

Nikou

Nikou Aquarium CO2 Atomiser, Carbon Dioxide Diffuser, CO2 Reactor Diffuser, Aquarium Accessories, Aquarium Equipment, Increases the Resolution Effect (12/16 mm)

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9.0

Excellent

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Main highlights

Osmosis technology: use reserve penetration technology to diffuse CO2, increase the dissolution effect and save the use of CO2
High-quality materials: the carbon dioxide diffuser is made of environmentally friendly materials, which are non-toxic, safe, energy-saving and durable
Good quality: CO2 diffuser aquarium has a full resolution rate, an excellent effect on the aquarium and a long service life
Essential tool for aquariums: the design of the secure nut locking system can effectively lock the carbon dioxide pipe and water pipe to prevent loosening
Easy installation: this CO2 inline diffuser is easy to use and install, good practicality. Suitable for aquariums with 16/12mm filter hose

23,69 €
06

Zerodis

Aquarium CO2 Atomiser, Aquarium Atomiser Outdoor Container CO2 Diffuser CO2 Reactor Diffuser Aquarium Accessories (M2 16/22 mm)

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16% Off
8.7

Very Good

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Main highlights

Please note: the external atomiser gives a slight "squeak" during use. This is not a leak, but the noise of CO2 gas after atomization.
Made of high-quality materials, non-toxic, safe, energy-saving and durable for long-term use. The design of a secure nut locking system can effectively lock the CO2 pipe and water pipe to prevent loosening.
Installation steps: Tighten the top and bottom shell with both hands and do not use brute force or hardware tools such as wrenches. Do not tighten the lock nut of the air line too tight, otherwise the air line will be damaged. Just a little tightness.
Good atomisation effect: reverse osmosis atomization tube, lower pressure requirement, finer atomization effect, only need pressure above 12 MPa to let air out. The use of a tubular atomization core brings a larger atomization coverage area compared to conventional ones.
Environmentally friendly: The use of reserve penetration technology to diffuse CO2 can increase the dissolution effect and save the use of more environmentally friendly CO2.

30,20 € 35,99 €(16% Off off)
07

MiOYOOW

MiOYOOW CO2 Diffuser Atomiser Aquarium Atomiser Generator Corrosion Resistant Aquarium CO2 Diffuser Reactor with Viewing Window for 12/16 mm Hoses

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8.6

Very Good

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Main highlights

Visual Window Design The external Co2 refiner is equipped with a small viewing window, which combines the observation window with the strong water flow design. The dilution effect can be observed through the small window, so you can see directly whether the diffusion is smooth.
STRONG EFFECT The refiner uses a built-in design refinement sheet, no large bubbles, large air outlet area, good atomization effect, large refining area, increase the resolution rate, increase efficiency and save CO2 consumption.
High Quality This refiner is made of high strength aluminum alloy material with anodized surface, corrosion resistance, durability and long service life.
Easy to Use CO2 external thinner is easy to install and use, the dilution blade can be replaced, easy to clean, suitable for aquariums with 22/16mm filter hose.
After-sales service: Thank you for your purchase. If you have a problem, please feel free to contact us at any time. We promise you the satisfactory solutions within 24 hours.

20,99 €
08

JBL

JBL Proflora CO2 TAIFUN Inline Membrane, Replacement Membrane for JBL Proflora CO2 TAIFUN INLINE and JBL PROFLORA Direct, Pack of 1

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8.5

Good

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Main highlights

Special ceramic for particularly efficient CO2 diffusion and smallest CO2 bubbles for maximum effectiveness
Efficient replacement membrane for the CO2 inline diffuser JBL Proflora CO2 TAIFUN INLINE (12/16, 16/22, 19/25) and the precursor JBL PROFLORA Direct
Easy installation by turning off the filter, screwing on the diffuser, inserting the watered membrane and finally screwing the diffuser back together
Due to a decreasing diffusion capacity of diffusers, an annual replacement of the membrane is recommended
Box contents: 1x JBL replacement membrane, JBL Proflora CO2 TAIFUN inline membrane, incl. 2 sealing rings, item no. 6469000

15,85 €
09

JBL

JBL ProFlora Direct High Performance

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8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

For economical and direct plant fertilisation: CO2 diffuser for external filters
Easy installation: connect to hose from external filter
Box contents: 1 x JBL ProFlora Direct 16/22, high performance direct diffuser, 63340, inline diffuser
Accurate dosage: integrated bubble counter, no water backflow due to return protection
20 percent CO2 - savings thanks to particularly effective membrane

27,20 €
10

DONGKER

DONGKER External Inline CO2 Diffuser Atomizer with Aluminum Alloy Bubble Counter for Plant Aquarium Canister Filter

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

【Inline Design】: 100% open flow design. There is no limit to filter flow. Installed outside the tank, does not take up the space in the tank, simple and tidy.
【High Resolution Rate】: Experienced players know better. The unique design dissolves CO2 more efficiently and saves more CO2 than CO2 diffusers in the tank.
【High Quality Accessories】Anodized treatment made of high-strength aluminum alloy, corrosion resistant, durable, long service life. Includes bubble recorder. The lens of the diffuser can be removed or replaced for cleaning.
【Dual Connection Version】: Support horizontal or vertical connection, customers choose the connection direction according to need. Note: must be used with the filter!
Clear and visible window: transparent and visible window, clearly see the work of the diffuser. 2 sizes, 12mm and 16mm (hookah size).

25,99 €