Got your call
@Roger A. Shrubber ....Thanks....
So I take a look at those pics to start..
Right off the bat I'll say the micro problems stand out big time! Differing issues in almost all plants....
Macro, Micro, pH issues abound..
Lets start here:
EXACTLY what did you feed them?
List ANY additive/supplement.
How much?
How often?
Res temps?
What do you feed now?
They look beyond that root rot issue...Remember that use of H2o2 in soil, will kill the micro beasties....
It would be to your advantage to re-introduce those Myco's..
Any "zyme" is basically a small set of myco's that eat the shed "skin" of the roots.....you want more then that....
Use or brew an AACT and use that..
Google that up on how....
I'll be watching this for your answer