I remember seeing a thread a while back where somebody said that they used a product as a CO2 source other than CO2. Does anybody know what this product might be (or similar)?
I've tried using the next to useless search function on the site, but since the only term I can recall from the original thread is CO2, and the fact that this is less than "4 letters long", I'm unable to search!
I've tried using the next to useless search function on the site, but since the only term I can recall from the original thread is CO2, and the fact that this is less than "4 letters long", I'm unable to search!
