First times a charm - zkittles auto dwc

4 seeds into rapid rooters into a drip feed dwc system with clay pebbles. 3 popped their first leaves in three days, one runt took longer at 6 days and was eventually pulled in week 1. I think I was over watering at first, will probably just top feed daily next time instead of a constant drip for the seedlings. 20-4 lighting from first leaves. Under a plastic tub dome at 85% humidity and 78f.