Plants are about 6 weeks old. 400 watt MH 18" above plant tops. Temps stay between 75-80 and Rh is 46%. Flora Nova nutes 600 ppm. PH is about 5.5-6.0. I've been hand watering them in 1.5" rockwool cubes, twice a day. I know they should have been transplanted weeks ago, do you think this is why the roots are brown?also the leaves are spotting, I don't know if I need more nutes or what. Need your guys help please, don't want to kill all 18 of my plants my first grow. Oh yeah the strain is NL and b-52.