Excuse the double post....
I might be clutching at straws here but thinking back a few years, from what I can remember, the only decent hydro attempt I ever did was in a heavily modified four pot wilma.
I drilled out the pots and the tray so the roots could grow down into the res. I'd rigged up two of those of those central heating header tanks and had a pump in the wilma pumping and flooming the water into the header tanks which was then pumped over the four pots and also had an overflow flooming back into the wilma tank. As I recall I had warm temps then but no rot but I was running cannazym throughout.
I am running cannazym now but that's obviously not helped but I'm thinking all that flooming created silly amounts of DO. Certainly more than a 60 LPM compressor could put out through four golf ball airstones through an aquafarm packed with roots and only holding half the volume of water it should due to the mass of roots.
Hmmm.... I'm starting to think we may be on to something here......
It would sure explain why the plants are perfectly fine when they're in the vegging tent under a small CFL. Not that much root mass until they get under the 600 then they go crazy and the PH starts to go erratic.. Hmmm.
In fact, I recall a week before I put the power plant under the 600 she hadn't got much root mass coming out of the pot and into the res so I gave her full strength rhizo and she started to go mental. I bet she wasn't using much DO in the water until then so there were no issues until after going under the 600.
Right then, if the Kush is okay she's getting the whole bottom of the res lined with huge airstone discs. I want the whole bottom of that res covered and fizzing. Then we'll see what happens.
Feeling a bit more positive - even if it might be false hope LOL