ya i hear that...ppms is good to go by. i will defitinitely start nutes later on nxt time around. but i really think it is a pH problem. the leaves seem stressed at the tips. my meter broke and we jus took pH with a aquarium kit and it was low!! could this lead to wierd, droopy, dried leaf tips and edges?? temp and everything are fine. the plants are growing outta control. about 15in already!!