Quote Originally Posted by throatstick

that was without co2 btw.never done co2 but want to when i can someday.
I'm trying out a Plug n Grow IGS-220 Co2/Temp/RH controller with good success right now. I doubt I'd do Co2 without a controller after trying one, if the IGS-220 or similar units are too expensive I've seen Co2 controllers on ebay for under $300, same as the CAP ppm3 that retails for $589 it looks like. You could also rig a relay to turn off the co2 when the exhaust fan comes on to save co2. The 3 lbs/light I've gotten was with natural gas co2 generators, but also with constant venting so co2 levels never got close to ideal...