Active Air 20 lb CO2 Tank

Active Air 20 lb Aluminum CO2 Tank — DOT 3AL Certified, Sold Empty

Supplemental CO2 is one of the most effective ways to increase photosynthesis rates and yields in a sealed indoor growing environment. Plants use CO2 as the carbon source for photosynthesis — raising CO2 concentration from ambient atmospheric levels (around 400 ppm) to 1,000-1,500 ppm significantly accelerates growth rates when light and other environmental factors are not limiting. A reliable, certified CO2 tank is the foundation of any supplemental CO2 system.

The Active Air 20 lb aluminum CO2 tank is sold empty and is constructed from high-strength aluminum alloy — lighter than steel tanks of equivalent capacity and rust-resistant over its operational life. The 20 lb tank stands 23.2" high and its slim profile makes efficient use of grow room floor space. The tank uses standard CGA-320 fittings compatible with CO2 regulators, valves, controllers, and timers. It is manufactured in accordance with U.S. DOT 3AL and TC 3ALM requirements and has been inspected and tested by a DOT and TC authorized independent inspection agency. Maximum fill pressure is 1800 PSI.

Key Features & Benefits

• High-strength aluminum alloy — lighter than steel tanks of equivalent capacity while maintaining structural integrity for CO2 storage at pressure.
• Rust-resistant — aluminum construction does not rust — a long-term advantage over steel tanks in humid growing environments.
• DOT 3AL / TC 3ALM certified — manufactured to U.S. DOT 3AL and TC 3ALM standards, inspected and tested by a DOT/TC authorized independent agency.
• 1800 PSI max fill pressure — rated for up to 1800 PSI maximum fill pressure.
• Standard CGA-320 fittings — standard CO2 tank fittings compatible with supplemental CO2 systems, regulators, and controllers.
• 20 lb capacity, sold empty — available in 20 lb capacity. Sold empty — fill at your local gas supply or welding supply source.

Who Should Use the Active Air 20 lb CO2 Tank

Indoor growers operating sealed or semi-sealed grow rooms who supplement CO2 to increase photosynthesis rates — particularly those with high-intensity lighting who want to push yields toward the ceiling of what their light levels support.

Filling and Connecting the CO2 Tank

The Active Air CO2 tank is sold empty and must be filled before use. CO2 refills are available at welding supply stores, homebrew supply shops, beverage gas suppliers, and many other commercial gas providers. Connect the tank to your CO2 regulator, controller, or timer using the standard CGA-320 fitting. Periodic hydrostatic testing of CO2 cylinders is required by regulation (typically every 5 years for aluminum tanks) — check current DOT/TC requirements for your jurisdiction and have your tank retested as required.

Frequently Asked Questions

Does the Active Air 20 lb CO2 tank come filled?

No — the Active Air CO2 tank is sold empty. Fill it at a local welding supply store, homebrew shop, beverage gas supplier, or other commercial CO2 provider before use.

What fittings does the Active Air CO2 tank use?

The Active Air CO2 tank uses standard CGA-320 fittings, compatible with standard CO2 regulators, valves, controllers, and timers. Most supplemental CO2 equipment for growing uses this standard fitting.

Why choose aluminum over steel for a CO2 tank?

Aluminum CO2 tanks are lighter than steel tanks of equivalent capacity, making them easier to handle and move. Aluminum also does not rust, which is an advantage in humid growing environments where steel can corrode over time.

What certifications does this tank have?

The Active Air CO2 tank is manufactured in accordance with U.S. DOT 3AL and TC 3ALM requirements and has been inspected and tested by a DOT and TC authorized independent inspection agency.

How often does a CO2 cylinder need hydrostatic testing?

DOT and TC regulations require periodic hydrostatic testing of CO2 cylinders — typically every 5 years for aluminum tanks, but check current DOT/TC requirements for your jurisdiction. Your fill provider can advise on the current testing status of your cylinder.