Ok RUI, newbie really needs help here. 4th grow not going so well. Day 50 of flower since the flip. Running DWC, 600w HPS 12/12, 48% humidity. Room avgs 82-84 degrees. Water 71 degrees. PH 6.0 and PPMs under 1000. AN 3part Jungle Juice, kool bloom liquid and bud candy. I think something is eating the tops off the flowers. Each lights on more tops (just the tops) of the flowers are gone. I can find no signs of critters during lights on. No dead bugs on the floor either. I did have what I think was a fugus gnat problem but cured it with azamax and no pest strips. Nothing flying around in weeks. Checked the net pots and did water changes to make sure nutes solution was right because leaves showing signs of stress. 6 more flower tops missing at lights on. What could be doing this? Anyone had this experience? All suggestions welcomed.