Man it seems everything went perfectly for about two months and now all I have is problems. My plants' leaves are turning yellow, which doesn't seem all that abnormal, but today is seems they've advanced further into yellowness than is usual for one day. Also there is some purple coming on a few of them that looks pretty disturbing. Worst of all, many of them are drooping right now. They look terrible, I tried to get the best pictures I could. It's hard to really see the yellowness, but you can see the purple ok. The drooping isn't on the whole plants, just some of the leaves, mostly the yellow ones. I changed the res two days ago and put in all the same stuff as normal, except for I added Adv. Nut's Overdrive at a little under full strength. I backed off a bit on some of the other stuff as well. My PPM right now says it only ~1200, so it seems fine. Any ideas?