smoke24answered grow question 4 years ago 12 inches is too close for your light at this stage of growth, you see the serations curling up...thats a sign of light stress. Too much light can cause all kinds problems. I looked at your nutrients and im seeing only .23tsp per gallon of calmag.....i'd go 1tsp per gallon. Feed ph looks good, however also check your runoff ph to make sure its not out of whack at the root zone. I'd put the lights at 24 inches and within a few days you will see a difference. Happy growing.