The only place locally that I can get CO2 is a paintball supply shop. They are using the smaller (22 ounce?) canisters for paintball, not the bigger 5 or 10# canisters. The price is not so bad, but I need to get my tank recertified. I don't mind if I can find a place to do it for $12 - $20, but $50 was a shocker!!!
Alan