Just a couple of questions...

Which are you having problems with...the soil grow, or the coco grow?
How much do you water, when you do water? In other words, do you get any run-off at all? Or do you water enough to have bunches of run-off?
Do you let the soil dry between waterings?
How many times in the past two weeks have you flushed them?
If having mold issues, how often do you foliar feed, or spray with plain water?
Do you have enough air circulation? (a dedicated fan, blowing on the ladies)
How close is the lamp from the tops?
Did you add 25% more perlite, or did it come with 25% perlite?