Last night I plugged everything into a timer so that they'll now go from 24/0 to 18/6. They are in their third week of vegging from the first sign of a sprout. I just went down stairs to check on them and give them some water and although the leaves are very lush and green, the veins are now a prominent dark green/blue. It was never that pronounced before.
Any ideas? They're in fox farm ocean soil and no nutes just watering when they're dry.