yeah i understand that, but the plants are in pretty good shape according to all who have seen them in person recently. (no deficiencies, good growth,) i think the problem is that I am a poor photographer of the indoors, and things close up, and people too). i was just getting the temperature down fast, and kinda circulating the air by keeping the fan on high for a minute. i usually have all the fans generall aimed at the lights, and the plants get air deflected from the lights above. i think I will hold out on the co2 thing though if it is gonna be worthless. i am going to be adding 50 clones to this set up soon and installing the light mover. I think thats when i'll install the co2