The UNS CO₂ Cylinder Pro (10LB) is a heavy-duty, premium aluminum gas tank engineered to fuel thriving, high-tech planted aquariums. Built for serious aquascapes, it combines durability, portability, and precise control so your plants get steady carbon dosing for fuller, healthier growth.
*Important Notice: All UNS CO₂ cylinders are sold and shipped EMPTY due to federal transport regulations. Before ordering, please verify that a local welding supply store, homebrew shop, fire extinguisher service, or paintball center near you fills or exchanges standard CGA320 aluminum CO2 tanks.
Note: Gas depletion rates vary based on target bubble count, photoperiod duration, plant mass, and aquarium volume.
| Attribute | Specification |
|---|---|
| Brand | Ultum Nature Systems (UNS) |
| Model | UNS CO2 Cylinder Pro (10LB) |
| Gas Volume Capacity | 10.0 lbs (4.54 kg / 6.7 L) |
| Material | Brushed Aluminum Alloy |
| Valve Stem Thread | Standard CGA320 (North America) |
| Safety Certification | DOT3AL Certified |
| Working Pressure | 124 BAR / 1,800 PSI |
| Test Pressure | 207 BAR / 3,000 PSI |
| Cylinder Height (Without Valve) | 16.93 inches (430 mm) |
| Empty Weight (Without Valve) | 13.22 lbs (6.0 kg) |
1. Does the UNS 10LB CO2 Cylinder arrive pre-filled with gas?
No. Federal shipping regulations prohibit the transport of pressurized gas cylinders. All cylinders are shipped empty and must be filled or swapped locally at a welding supply company, fire protection shop, or homebrew supplier before use.
2. How long will a 10LB CO2 tank last on a planted aquarium?
On a standard 40- to 60-gallon planted aquarium running a standard 2 to 3 bubble-per-second rate for 8 hours daily, a 10LB cylinder typically lasts between 9 to 12+ months before requiring a refill.
3. Will this cylinder work with regulators from other brands?
Yes. The UNS CO2 Cylinder Pro features standard CGA320 threads, making it universally compatible with any North American CO2 regulator designed for standard aluminum cylinders (including UNS, Flipper, FZONE, and CO2Art regulators).
Setting up pressurized carbon dioxide is far simpler than it appears! Explore our step-by-step guides to master your setup:
Overall rating: 4.6666665 / 5 from 6 reviews.
Review topics: [looks].
"My whole setup is treating just great. The 10 lb. tank keeps me from refilling so often."
"Everything came in perfect, minus the drop checker but they're working to send a new one!"
"Love the look of this tank. I do not have a cabinet to store it in so I wanted the look of this tank. The tank date indicates that it already had two years of the 5 before getting it recertification and this was pointed out to me by the company who filled it with CO2."
"I purchased the 10 lb tank and love it! It looks great as I have an open stand for my 48gal planted tank. It can be tricky to find someone to fill it. Most welding shops want to swap them with a dented rusty tank they have. I found a shop to do it and it is only $15.00 to full with a 2 day turn around."
