I check the ph lik 3 times a day, ive kept it around 6, but usually when i get off of work it is in the low 5's high 4's. two day ago I changed the water, and used tap water for the first time.That where I think the problem might have happened, is tap water bad for the plant? Im using Cutting edge solution grow nutes. the temp is around 70 to 80. The root on the two that look the worst are twisted up, and kinda brown. But there is no smell or slim in the bucket. I am also using a pretty large aqua stone, so I think they are getting enought oxygen for a 5 gal bucket. I think the humydity may be a little high, but There was never a drastic change to the plant before i used tap water. Today I changed the water back to distilled