Well they picked up quick in 4 days :thumbsup:

Just be sure to pick a lighting schedule u like and stick with it. Dont wanna jump around too much.

I think black spots are either mold or mites. Looks like it might be a little mold. if so, cut the infected areas carefully and get rid of em (Can spread easily thru the air).

Id wait for a nute specialist to chime in tho :thumbsup: Could disinfect the area in the meantime; mites and mold love dirty grow areas [from experience]:hippy: