I am a new growing 1(2 months old) plant in a 5x5 closet and a 400 HPS lamp. Im using an active reconver hyroponic top feed system I initally had problems with ventilation during the vegegtative phase, however; a couple of fans in the right places fixed the problem. My plant has yellow spots on the leaves and they are crumbling. This started when the room was hot, but now that the room is cool the leaves are not getting better. I think it might have a problem with the nutrients(foxfarm). Any help would be greatly appreciated.