Sorry computer froze problem. Anyways I am not sure what to think. I do not use a cool vented tube, I am using a cfl 85 watt 5000k, and I switch from that to a led grow light that has the 440 and 660 or 640 or what ever you call it, and that is about 30 watts. I took out and threw away the cotton candy from delicious seeds, it showed no signs of life, all leaves except one wilted, and the one that was did not wilted was fried it seemed, and crunchy so I trashed her, but before I did, I looked at the roots, and they were still white, they were not brown or anything, and there were a lot of roots, like getting to the cup sides on all sides, and down to half the cup. These are drinking cups standard size for kids parties with holes in the bottom plastic and I think BPA FREE. The other one that I am not complete sure about is the other plant. And that is the Northern Light Blue from delicious seeds, she is confusing me.
Before this bad thing, happened, both plants were doing perfect, their leaves were always reaching up more up than sideways, and getting bigger and bigger, and now the only plant that is left seems to be doing ok, but I do not know. It seems that as the days go by that she is a little crunchy on the top leaves, and a little black on the tips of the one inch long leafs. I switched her to a dwc. And her roots still look white. I kept her on the same nutrients, which is miracle grow, advanced nutrients a and b with ph perfect, and some water I do admit is tap water, the rest distilled and bubble for co2. I used rubbing alcohol, for whipping the scissors before I cut just barely at the tips of some of the leaves to get off some black, and some crunchy, just like you do to clones I cut the leaves but unlike with clones, I barely cut them. I took some pictures. I am using as a foliage and with the nutrients advanced nutrients revive. Oh and I used a 600 watt metal halide a little here and there. I keep the lights on 24 hours a day, except every once in a while where I turn them off for an hour or two. Any help is appreciated, what should I do?