So this is techinically my second grow, first with sodium bulb. I just recently (1-2 weeks ago) turned my lighting to 12/12 and water every other day 10min before lights come on. I have been noticing one plants leaves seem asthough someone is very lightly painting yellow on some of the leaves. (Pic included) I got talkin with a buddy of mine and he says it could be a major problem. So here i am now