you can make CO2 by making alcohol (alothough u cant drink the alcohol at the end ) all u need is bit of yeast warm water and lods of sugggarr lol... dont no the exact ratios tho sorri dude ...
yea vingar and baking soda works to but i find is alot faster so if ure in need of a quick burst ..... however if u require a medium paced CO2 flow then fementation is goooood