05-05-2019, 06:59 PM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
| | Re: DIY carbon source, not CO2
You can also get a lot of CO2 in the water by blowing in a air hose that goes to a little pump in the tank, or filter, and letting the pump rotor make micro bubbles of it. I used that technique when I was experimenting with drop checkers several years ago.