No experience but interesting...

All Natural CO2 Generators for the purpose of CO2 enrichment and air fertilization

A step up from Yeast/Sugar/Water ( works on the same principle ) but at $135 I'm wait till there are solid reviews...
ZZTops Reviewed by ZZTops on . CO2 boost info I have recently come across this CO2 product that comes in a bucket. Is this comperable or even better than the natural gas that comes in refillable canisters. Any people that have used this product or know anything about it any and all info is appreciated. Rating: 5