DIY co2 using power head?
Hey I'm just getting into the DIY co2 and have read that you can feed the hose from the bottle to the venturi on a powerhead instead of getting a diffuser of whatever. Having the power head only turn on for a few hours during the day. This seems like a good method if you want to control the co2 "input". My question is, is this an efficient way to disperse co2 onto a 20g? Also, my powerhead is for a 10-30g.