Originally Posted by Drewsplantednutz
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.
It's more efficient than just letting it bleed out through an airstone. Don't plug it into the venturi though, the bubbles will be huge still. Feed the stream of Co2 (preferable through an airstone) into the intake of the powerhead and allow the impeller to chew it up.
This is a good way with a DIY setup. Some diffusers require an operating pressure that is not achievable with DIY setups. Reactors are the best
way, but the powerhead method described above has worked very well for me.