Thanks Loc. There's many things I could be doing better here. For instance, the linked bubbler system I made doesn't circulate between the buckets well. One will be at 1200 ppm, the next will be 1000. I have a small pump and will be trying to figure out how to pump water to the buckets to make things uniform.

Till then, I put the 2 affected plants in the buckets with the lowest ppm. I.e.; one is in 400-500. Sort of given them a break from nutes for a couple days. The water is also lowered to try to give the roots more air. I'm thinking of even trying to remove the net pots to dry the roots out a bit for a couple hours.

I read your thread when you went from 400 to 1000 watts. I'm 1/2 tempted for find a very cheap system. Though I'm not even sure why I'm doing all this because what I got off the one plant I grew will last the 2 of us about 10 years.