Originally Posted by polishfalcon420

you know that crossed my mind too actually. you see I went back to work like two days after they sprouted. in which the first day they all stretched real bad on me and actually fell over. so I lowered my light some and got the fan going, the very next day they all stood up on there own and began to get thicker stems and all had four leaves so I added like a 100ppm of nutes. then when I came home from work like 16hrs later they all bushed right out and grew too close to the light and directly into the path of the fan. so I didnt know if it was light burn, wind burn or the small dose of nutes, I readjusted my light and fan and flushed for 3 days which perked them right up and growth never slowed at all, but now I still seem to be getting what looks like a mag def. it is on the first 3 sets of fan leaves and not on any new growth or branches that have started. the yellow spots start in the center of the leaves and work its way out and they curl upat the tips. last night I bumped up the nutes to 400-450ppm and they seem to respond well and as of right now none of the new growth has the problem so Ill let it go and see what happens before I go crazy with the epsom salt or do anything stupid. the system works great but my work schedule is killing me cause the growth is so rapid. I ordered an iceprobe chiller by coolworks that should be here this week so atleast my res temps will stay consistent while Im gone. thanks to everyone here for the help and knowledge.