ADA · Diffuser
Pollen Glass Beetle
Pressurised CO2 tanks where you want a neat, nearly invisible diffuser and are happy to clean glass now and then.
3 models
UNS · Diffuser
UNS CO2 Diffuser
A clear acrylic in-tank diffuser with a white ceramic disc that breaks CO2 into a fine mist of bubbles. Acrylic makes it harder to break than the usual glass diffusers.
Updated
Will it suit my tank?
litres
Best for
Any pressurised CO2 tank where you want a simple, low-cost in-tank diffuser.
Worth knowing
Discs clog over time and need a soak in diluted bleach to restore fine bubbles.
What stands out
- Three sizes by tank volume: Small, Medium, Large
- Ceramic disc diameters of 12, 17 and 24 mm
- Transparent acrylic, less fragile than glass
- Suction cup included
Models and specs
| Model | Tank size | Disc diameter |
|---|---|---|
| SmallUNSCDS01 | up to 98 L | 12 mm |
| MediumUNSCDM01 | up to 197 L | 17 mm |
| LargeUNSCDL01 | from 197 L | 24 mm |
- Brand
- UNS
- Body
- Clear acrylic
- Disc
- Ceramic
Figures from Glass Aqua's product listing. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
Browse all co2
ADA · Diffuser
Pollen Glass Type 3
Small to medium pressurised CO2 tanks where an upright glass diffuser suits the look.
1 model
Qanvee · Diffuser
Inline CO2 Atomizer
Planted tanks with a canister filter, especially 190 L and up, where you want hidden CO2 hardware.
2 models
Twinstar · Diffuser
CO2 Diffuser
- Tank size
- 121–121 L
Small to large planted tanks where you want a tough, tidy in-tank diffuser with the bubble counter included.
3 models
Frequently asked questions
Quick answers about the UNS CO2 Diffuser, drawn from its specs.
What size tank is the UNS CO2 Diffuser for?
The maker rates it by model: Small up to 98 L, Medium up to 197 L.
Who is the UNS CO2 Diffuser best for?
Any pressurised CO2 tank where you want a simple, low-cost in-tank diffuser.
Is there anything to watch out for with the UNS CO2 Diffuser?
Discs clog over time and need a soak in diluted bleach to restore fine bubbles.
What are the alternatives to the UNS CO2 Diffuser?
Other co2 worth comparing: ADA Pollen Glass Beetle, ADA Pollen Glass Type 3, Qanvee Inline CO2 Atomizer. Add any of them to the compare table to see the specs side by side.