So I've had this problem on last grow and it's seems to be back. Tingrine-o-matic, week 5, fox farms soil, Humboldt country nutes and recharge but very limited. Was using well water but have switched to distilled and came up in ph from 6-6.5 to 7. Neem at 3 weeks one time. Humidity 40-50%, temp 73-80, well ventilated, fans keep gentle movement of leaves, 2 300 watt leds, 1 315 watt cmh.