Quote Originally Posted by newtodro
Thanks I appreciate the words of wisdom. Last quick question is co2 a must or can I get just as good grade medicine without? Thanks again
If your passive vent is from the outside into the room then you'll have about 300 ppm for free. I think you would do fine without all the bells and wistles of the industry! Follow your heart! Did you grow killer meds the first time without cO2?