UNS · Complete kit
Micro CO2 Kit
Nano and desktop planted tanks where you want timed, pressurised CO2 on a small budget.
1 model
UNS · Complete kit
UNS Pro CO2 Kit
A full-size refillable CO2 system: a UNS Pro cylinder with the Pro Dual Stage regulator (the 2.5 lb kit uses the Mini regulator). It is the long-term option, with fewer refills and room to split gas across several tanks.
Updated
Will it suit my tank?
litres
Best for
Medium to large high-tech tanks, or several tanks fed from one cylinder.
Worth knowing
Cylinders ship empty and need hydrostatic testing every five years in many regions.
What stands out
- Cylinder sizes: 2.5, 5, 10 or 20 lb
- Pro Dual Stage regulator with two gauges and bubble counter manifolds
- Standard CGA-320 fittings, refillable at gas and welding suppliers
- Tubing and diffuser included
Models and specs
| Model |
|---|
| 2.5 lbUNSPCK25 |
| 5 lbUNSPCK05 |
| 10 lbUNSPCK10 |
| 20 lbUNSPCK20 |
- Brand
- UNS
- Regulator
- UNS Pro CO2 Dual Stage (Mini Dual Stage on the 2.5 lb kit)
- Stage
- Dual
- Solenoid
- Built in
- Cylinder
- Refillable CGA-320 aluminium (ships empty)
- Included
- Regulator, cylinder, CO2 tubing, diffuser
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
UNS · Complete kit
Nano CO2 Kit
Tanks of roughly 4 to 40 litres where you want dual-stage stability without a large cylinder.
1 model
UNS · Complete kit
Paintball CO2 Kit
Small to medium planted tanks where cartridges run out too fast but a full-size cylinder will not fit.
2 models
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
Frequently asked questions
Quick answers about the UNS Pro CO2 Kit, drawn from its specs.
Who is the UNS Pro CO2 Kit best for?
Medium to large high-tech tanks, or several tanks fed from one cylinder.
Is there anything to watch out for with the UNS Pro CO2 Kit?
Cylinders ship empty and need hydrostatic testing every five years in many regions.
What are the alternatives to the UNS Pro CO2 Kit?
Other co2 worth comparing: UNS Micro CO2 Kit, UNS Nano CO2 Kit, UNS Paintball CO2 Kit. Add any of them to the compare table to see the specs side by side.
What sizes does the UNS Pro CO2 Kit come in?
4 options: 2.5 lb, 5 lb, 10 lb, 20 lb.