Qanvee · Diffuser
Inline CO2 Atomizer
Planted tanks with a canister filter, especially 190 L and up, where you want hidden CO2 hardware.

ADA · Diffuser
ADA's glass CO2 diffuser with a flat ceramic disc held between two suction cups. The number is the disc diameter, so bigger discs push out more fine bubbles for larger tanks.
Updated
Pressurised CO2 tanks where you want a neat, nearly invisible diffuser and are happy to clean glass now and then.
Glass is fragile, and the disc clogs over time, so expect occasional soaking in diluted bleach.
| Model | Disc diameter |
|---|---|
| 30 | 30 mm |
| 40 | 40 mm |
| 50 | 50 mm |
Figures from the maker's widely published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Qanvee · Diffuser
Planted tanks with a canister filter, especially 190 L and up, where you want hidden CO2 hardware.
Twinstar · Diffuser
Small to large planted tanks where you want a tough, tidy in-tank diffuser with the bubble counter included.
UNS · Diffuser
Any pressurised CO2 tank where you want a simple, low-cost in-tank diffuser.
UNS · Diffuser
Canister-filtered CO2 tanks where you want a clean, equipment-free look inside the glass.
Quick answers about the ADA Pollen Glass Beetle, drawn from its specs.
Pressurised CO2 tanks where you want a neat, nearly invisible diffuser and are happy to clean glass now and then.
Glass is fragile, and the disc clogs over time, so expect occasional soaking in diluted bleach.
Other co2 worth comparing: Qanvee Inline CO2 Atomizer, Twinstar CO2 Diffuser, UNS CO2 Diffuser. Add any of them to the compare table to see the specs side by side.
3 options: 30, 40, 50.