Serious Wilting!!! - Auto Lemon Skunk
Angus if you never figured out what happened with these plants, I think I can help you. I had the same problem over and over and over. It can happen at any stage and it's what I consider the NEW worst hydro problem you can ever get and it's a bitch to get rid of. Welcome to the world of thrips angus. Simply move the top of the grow media around close to the stalk at the top of the pot. You will see them. They eat the roots and it will trick you into thinking its a disease or some sort of imbalance. Spinosad and mosquito dunks(or microbe-lift from growco) will do the trick. However you have to keep up the process through-out. They will be back and they will sneak up on you! These are way worse than spidermites, in my opnion anyway. Simply for the reason you beat your head trying to figure out what it is and then it's too late.
Serious Wilting!!! - Auto Lemon Skunk
also look for shiney spots on your leaves, kinda like slug trails. Hope this helps someone because this can be a super nightmare.