its in rock wool i water 4 times a day 24/7 lights mh 2550pot well its in a grow box,temp 83 and hum at 47,ph is 5.5-5.8the ppm burned them i think around 500 it jumped to i put it on 150 ppm jumped back up to 500 am useing lemon juice did that raise my ppm?am waiting for my ph down from mail...