ok, quick update.

lights off temperature...18c
lights on temperature....24c

so no probs there i shouldnt imagine. My solution level is always kept about 3 inches below the pots, and the airstone is adequete for my size res.

Therefore..my problem MUST be nute solution related.

Im gonna flush out my system, and replace solution with ph 5.8 full strength grow solution. I am on 12/12 lights now, but like to keep with a GROW solution until about 3 wks in.

Will keep the posts comming.