Ima get to the point took out rockwool cube with seedling out off the humidity dome which is the reservour for my hydro setup. So I put the seedling in its netpot and later that night I noticed the cotyledons well one turning brown, eventually I clippd it off and then emptied reservoir to use as humidity dome again hoping it would reverse whatever that was going on.. btw I only have 3 23w vegg cfls for now then 135w led. Heres a pic of the seedling notice how its kinda brown on a spot