This is sort of along the the same line, so I figured I ask here instead of starting another CO2 thread. I was in the grocery store and saw the one gallon orange juice and thought that the container would make a good vessel for a DIY CO2. It's has a good firm handle which would make it easy to take in and out from the cabinet. My concern is if a one gallon container is too much for a 29 gallon tank. Then again I guess I can decrease the reactants to cut down on the CO2. I was going to take a basic mixture and multiply by however many liters in a gallon. Any comments or suggestions would be great.