UNS CO2 Cylinder Pro - 5LB
Product Overview
The UNS CO₂ Cylinder Pro (5LB) is a compact, heavy-duty aluminum gas tank engineered to give planted-tank hobbyists reliable, long-lasting CO₂ delivery without the bulk. Lightweight, corrosion-resistant, and easy to handle in humid cabinet environments, it serves as the ultimate sweet spot for dedicated pressurized systems.
*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.
Key Features & Benefits
- Manual On/Off Twist Valve: Dedicated shut-off valve gives you complete control over gas output, preventing accidental leaks during regulator installation or refills.
- Brushed Aluminum Construction: Lightweight, rust-free metal withstands high humidity inside aquarium cabinets without corroding or staining surfaces.
- Versatile 5LB Capacity: Strikes the perfect sweet spot for larger layouts, running multiple tanks, or simply cutting down on trips to the refill shop.
- DOT3AL Certified Safety: Manufactured under strict Department of Transportation standards to guarantee structural resilience under high pressure.
- Universal CGA320 Threads: Connects to all standard North American CO2 regulators without requiring custom adapters or thread converters.
Technical Specifications
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 (5LB) |
| Gas Volume Capacity | 5.0 lbs (2.27 kg / 3.35 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) | 14.53 inches (369 mm) |
| Empty Weight (Without Valve) | 6.61 lbs (3.0 kg) |
System Pairing Recommendations
- Nano / Desktop Setup: Pair the UNS Paintball Cylinder with the UNS Mini Dual Stage Regulator for tight cabinet spaces and small tanks under 20 gallons.
- Standard / Pro Setup: Pair the UNS CO2 Cylinder Pros with the UNS Pro Dual Stage Regulator for medium-to-large display tanks requiring maximum long-term pressure stability.
What's Included
- 1x UNS CO₂ Cylinder Pro (5LB Aluminum Tank with Manual Valve Stem)
Frequently Asked Questions
1. Does the UNS 5LB 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 5LB CO2 tank last on a planted aquarium?
On a standard 29- to 40-gallon planted aquarium running a standard 1 to 2 bubble-per-second rate for 8 hours daily, a 5LB cylinder typically lasts between 6 to 9+ 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).
Team Buce Plant Tips
Setting up pressurized carbon dioxide is far simpler than it appears! Explore our step-by-step guides to master your setup:
- Learn how to install and tune your system: How to Add CO2 to Your Planted Aquarium.
- Understand the science behind plant growth and carbon injection: The Mysteries of CO2 in a Planted Tank Explained.