Thank you guys. They seemed to be doing pretty well, until today. I had roots coming out of all of the drainage holes of the cups 3 days after transplanting to solo cups. I transplanted on the 7th and had roots on the 10th. The roots are now exploding out of the bottoms. I fed Monday 7/11/16 at 12:30am first time with a little less than half strength 450ppm 6.0ph and some runoff (was 1/4 strength with almost no runoff before), then i fed again yesterday morning Thursday 7/14/16 at 1am with half strength 550ppm 6.0ph and more runoff, like 15% runoff. Humidity is 65-75% still, with temps around 75-77 sometimes drifting to 72-80. Lights about 8 inches from the top (4 bulb 4foot T5). 400CFM exhaust fan+filter combo on a little higher than lowest setting of the fan controller.
Everything seemed to be going pretty well until today i noticed i have a lot of leaves clawing at the tips. Some of them also curling down looking like they are over watered but most of them just have the tips pointing straight down (pics). I'm not sure what the issue is. I had 3 days in between waterings so i don't think it should be over watering? Thoughts? My research tells me its nitrogen toxicity...? Should i flush them and feed again at a lower dosage? Currently its Foliage pro+Protekt and calmag from botanicare. 0.6ml FP, 0.6ml Protekt and 1.5ml calmag.
On a side question, should i be transplanting soon? Its been about 1 week since i transplanted and ive got a lot of roots out of the bottom its almost clogging the drainage holes. Should i go ahead and move them to their permanent grow pot? (3 gal fabric pots). Will be scrogging 16 plants in a 10x10 room with 4k watts. 4 plants per tray 4 trays.
On a side side question, i have one plant whose leaves are turning a slight shade of purple. Any idea about this? Almost all of my plants stems are purple now as well.
(pictures are sorted in order. first set of root pics are sunday pictures when i first noticed the roots. 2nd set of root pics are as of today. and the clawing pics are as of today)