Used 5 lb CO2 Tank | Brewing, Aquariums & More

Used 5 lb CO₂ Tank for Brewing, Draft, and Aquarium Use

A used 5 lb CO₂ tank is a cost-conscious way to add a cylinder to a home draft setup, kegerator, keezer, sparkling water system, planted aquarium, or other compatible CO₂ application. The 5 lb size is popular because it fits many home beverage setups while still providing useful gas capacity for serving and carbonating.

Used cylinders may show cosmetic wear and exact appearance can vary from the photo. Tanks are sold empty and must be filled or exchanged before use. Always confirm that the cylinder, valve, regulator, and intended gas supplier are compatible before relying on any CO₂ tank in a draft or aquarium system.

Good fit for

• Homebrew draft systems: kegerators, keezers, jockey boxes, and small home bars.
• Carbonation workflows: force carbonating beer or supporting sparkling water and compatible beverage setups.
• Aquarium CO₂: planted aquarium systems that use a compatible CO₂ regulator and fittings.
• Backup cylinder use: keeping a spare tank on hand so draft service is not interrupted.

Fill and exchange notes

This tank ships empty. Local customers can use our 5 lb CO₂ tank exchange when the tank is compatible with the exchange program. For full local gas details, visit our Vista CO₂, nitrogen, and beer gas exchange page.