oh yeah, i forgot to ask do you foliar feed? and also can you elaborate on your setup a bit more, you said a drip system, but are your roots sitting in a resivior below? also i noticed your drip system drips the water overtop the hydroton, try to burry that thing 2 inches or so down, you want to keep the top of your medium bone dry so you dont run into any mold issues, just lettin ya know cause ive been there