PowerTrance
Well-Known Member
According to a university paper at http://www.energy.wsu.edu/documents/building/iaq/CO2inbuildings.pdf we exhale 35,000 - 50,000 ppm CO2. That's an insane amount of CO2!! So I say, USE IT !! Just tape together a bunch of garbage bags and sit for a few hours exhaling into them to fill them up. Then you'll have plenty of CO2 for a slow release into the grow room. Wouldn't that quickly increase the CO2 ppm in a 8' x 8' room?