UNS CO2 Cylinder Pro - 5LB

The UNS CO₂ Cylinder Pro (5LB) is a compact, heavy‑duty aluminum tank engineered to give planted‑tank hobbyists reliable, long‑lasting CO₂ delivery without the bulk. It delivers longer runtime and stable CO₂ for consistent plant growth, is corrosion‑resistant for easier handling in humid cabinets, and pairs with UNS regulators for reliable, precise gas control. Ideal for hobbyists running dedicated pressurized systems, it’s a smarter long‑term choice than disposable cartridges or paintball setups.

Key Features & Benefits

• A dedicated manual on/off twist valve gives you complete control over the tank opening, so you never have to worry about sudden leaks during installation.
• Lightweight brushed aluminum construction provides a clean, rust-free look that easily handles the humid environment inside an aquarium cabinet.
• The generous 5-pound capacity strikes the perfect sweet spot for larger layouts, running multiple tanks, or simply cutting down on your trips to the refill shop.
• Official DOT3AL certification guarantees the cylinder meets strict safety and pressure standards for worry-free operation in your home.

Product Specifications

• Gas Volume Capacity: 5 lb / 3.35 L
• Regulator Compatibility: Fits all standard CGA320 threaded regulators (Note: While it technically fits both the Mini and Pro UNS styles, this size cylinder is most commonly paired with the UNS Pro Dual Stage Regulator for larger aquariums).
• Material: Aluminum
• Safety Certification: DOT3AL Certified
• Working Pressure: 124 BAR / 1800 PSI
• Test Pressure: 207 BAR / 3000 PSI

Technical Specifications

Please note that gas depletion rates will always vary depending on your target bubble count, plant density, and tank size.

• Cylinder Height (Without Valve): 369 mm / 14.53"
• Cylinder Weight (Empty / Without Valve): 3 kg / 6.61 lb

**Important Note: All UNS CO₂ cylinders are sold and shipped empty due to shipping regulations. Before ordering, we highly recommend checking your local area for a certified welding supply shop, homebrew store, or paintball shop that can fill standard CGA320 aluminum CO₂ tanks for you!

Sizing Recommendations

• The Mini Setup: UNS Paintball Cylinders + UNS Mini Dual Stage Regulator (Best for nano tanks, tight cabinet spaces, or desktop scapes).
• The Pro Setup: UNS CO2 Cylinder Pros + UNS Pro Dual Stage Regulator (Best for larger displays, high-tech demands, and maximum long-term pressure stability).

What’s in the Box?

• 1x UNS CO₂ Cylinder Pro (5LB)

Team Buce Plant Tips

Fine-tuning your CO₂ setup can seem intimidating at first, but the process is far simpler than it appears. For a safe and reliable introduction, refer to our guide on How to Add CO₂ to Your Planted Aquarium. And if you’re curious about the science behind why CO₂ makes your buce, stems, and carpets thrive, explore The Mysteries of CO₂ in a Planted Tank Explained for a clear breakdown.