Probably just algae, and nothing to worry about. Once they start getting big fan leaves, the algae should go away.
dooobster Reviewed by dooobster on . PurpWidow/TrainWreck Just got my seeds in today!! that means Day 1 is today. Equipment: HydroHut Mini 2 125 watt CFL for seedlings 400 MH 600 HPS Scrog and everything in the picture! Rating: 5