Planted Aquarium CO2 Diffusers
Aquario CO2 Diffusers explained
Aquario Neo CO2 Diffusers are available in a variety of sizes and styles, making it easy to find one that fits your aquascape's needs.
While the model names may seem overwhelming at first, choosing the right diffuser comes down to three simple decisions: disc size, pipe style, and diffuser body.
STEP 1: Disc Size
Aquario Neo CO2 Diffusers come in 4 different sizes. Choose the ceramic disc size based on your aquarium volume.
TINY
Ø8MM
Up to 13 gallon
SMALL
Ø12MM
Up to 26 gallon
MEDIUM
Ø17MM
26 - 53 gallon
LARGE
Ø24MM
53 gallon +
STEP 2: Pipe Style
Next, choose the pipe style that best fits your aquarium and preferred CO2 tubing route. Whether you have a rimmed, rimless, nano, cube or tall aquarium, there is an Aquario CO2 Diffuser that will match your aquarium type and size.
All three pipe styles provide the same CO2 performance—the only difference is how the diffuser installs and where the tubing connects.
NORMAL
A traditional diffuser design that works with both rimmed and rimless aquariums.
Normal Special in a 40 gallon aquarium
EXTEND
Ideal for taller or non-standard aquariums where additional pipe length provides more flexibility. Use as-is or DIY bend it!
Extend Special in a 40 gallon aquarium
CURVED
A sleek and clean solution that does not require suction cups. It hooks over the aquarium rim for a cleaner appearance.
Curved Original in a 20 gallon aquarium
STEP 3: Body Style
Once you’ve selected a disc size and pipe style, choose the diffuser body. All three body styles perform the same, so this decision comes down to preferred appearance and the footprint inside your aquarium.
TINY
The most compact form and designed to remain as discreet as possible in nano aquariums up to 13 gallons
The most discreet option for nano aquariums and minimalist layouts
ORIGINAL
The classic Neo diffuser body that started it all! The most recognizable design in the lineup.
A timeless design that balances visibility and performance
SPECIAL
A lower-profile version of the Original for aquascapers who prefer a cleaner, more minimalist look.
Pairs beautifully with the Curved pipe for the cleanest presentation
What's the difference between an inline and in-tank CO2 diffuser?
In-tank diffusers install inside the aquarium, while inline diffusers connect directly to your filter tubing to keep equipment out of display.
How often should I clean my diffuser?
Ceramic discs need periodic maintenance to maintain fine bubble production. In between deeper cleans, use a soft-bristle to remove any built-up residue!