I've been growing this plant and it has now been in flower for 1 month tomorrow. The leaves are turning crispy and brown like nute burn. Info about my setup... 250w HPS on 12/12 growing in a cab with dimensions 29" x 19" x 48" Temp max is 80.1 deg with the lights on. Temp min is 72ish deg with the lights off. I am growing in a 2 gallon bubble bucket. I have two air pumps, each with their own air stone. The pH of my water hovers around 5.9 - 6.2. There is no algae in the water whatsoever because I change the bucket every 4 days with brand new pH balenced water with generic nutes 12-4-8. (I know at this point it should be higher than 4, but I haven't had the time to go out and get new nutes.) Now a little about the problem... I saw the browning starting on the leaves, so I replaced my res with straight up water, no nutes. The browning didn't stop so I let it go for 2 days to see if it would improve, but nothing. I added a little bit of my ferts and the problem didn't accelerate, but the browning continued. I don't think it has to do with my nutes because I've actually lowered them since the end of veg, and the plant was looking beautiful then. There is some brown on my roots, which I think may be root rot. Would this cause the leaves to turn brown and crispy? Don't have a camera right now, but I will get pics up in about an hour or so. Any help would be appreciated.