Yep, 2 tbsp of 35% every other day. I really don't think overwatering is the issue because I only water 5 times for 15 minutes at a time. It looks nutrient related to me, but what do I know.

As for the roots, I really don't know why they would grow down out of the net pots and then stop. I would think that if they were grown well down past the net pot that they wouldn't be choked, but again, what do I know. The res temps stay between 55 and 65.

I will probably just stick with hydroton I guess since I have 3/4 a bag left and look into switching down to road or something if problems continue. I also want to try the nutes PC was mentioning for my next flower cycle and hopefully half of them won't die!