This Mini CO2 Regulator is used to regulate the flow of carbon dioxide (CO2). Ideal for use in planted aquariums or for supplying CO2 to calcium reactors for reef aquariums.
The single gauge displays canister pressure, so you know when your cylinder gets low on CO2 or empty.
This is absolutely the best bang for your buck if you're looking to set up CO2. Get a 5lb tank, put a bubble counter right on the regulator (it goes sideways on the 5lb tanks), run a line to the tank with a diffuser...DONE! You DO NOT need to spend big bucks on a CO2 system, this is SUPER EASY.