Well bro, it could be a million things.
Do you have proper air pump for your water? are the temps in check?
2 things I see.
1: Those lights could me a good foot to a foot and a half closer, try getting them as close as possible. Easiest way to do this is to put your hand under the lights. As soon as you can't feel the heat, that is how far away you want your lights from the top of the plants.
2: Looks like you barely have any nutes in the soup. What is your EC?
PS: Might want to bring the nutrient level up higher as far as how much water is in the bucket. Low water levels cause cord roots.
Everything looks to be in check except the roots... i dont know enough to comment about the additives you are using?
What are your water temps? how big is your rez? a smaller rez will heat up much faster than a large one...
Im sure richy would have better insight on this than myself... i will just entertain you till he gets back.. lol
I got carried away in my workshop and lab the last few days. I'm back now.
lonetoker,
Good news, I don't see any root infections. Bad news, you seem to have a system problem. I'll bet money your bucket levels are dropping fast everyday by the size of your girls and their thirst...
[email protected]go ahead and send me a throw away email addy