I have not allowed my plants to air prune and i put them in 3 gallon pots in my ebb and flow tray...and within 2 days they have started to turn yellow...they are 3 weeks old and 3-4 inches tall..[attachment=o187171]

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here is what they looked like Tuesday night ...they were only in the tent in the ebb and flow 24-30 hrs and they started to yellow...i switched from watering by hand 2 times a day in a tray to the ebb and flow Sunday at 6pm and they started turning yellow by Tuesday morning at 7am ...something just doesn't seem right ..if i had left them alone with no nutrients i don't believe they would have started to yellow so whats up ...?