Hay thanks LLamaman, I appreciate your in-put. I looked at all kinds of CO2 gens and just couldn't sport the cash. Dry ice is just frozen CO2 and I can put a fist size chunk of it in a bowl near the top of my grow space and just let it melt away, cools the room a bit as well I suppose, but my temp seems good. I'm thinking that I need to increase my nutes as I'm only using like a quarter of what is recomended by the lable. Keep the advise a commin!!