nutriant

I have 3 Auto Sweet Tooth plants that all seem to have the same issue, RH 50 to 55%, 81F on 74 off, cyco nutriants, 600watt HPS and 315watt CMH in different tents both same RH, CMH tent is 2 degrees cooler lights on, soil fox farm ocean Forest, pH is high 6, I feed at 6.3