Thanks for the reply. Because some of the leaves I thought were N deficiency. But at the same time I saw burnt tips and figured it has to be nute burn. The problems should be under control now. As far as the heat, I think its pretty reasonable. I have the lights almost 2 feet off the top. What made you think heat issues? The curled new leaves? Maybe the intake fan I have would be better used for exhaust, but I already have an exhaust fan. It is an 8 inch desk fan, but its power is just average.