Buckets look great wrapped! I had the same problem with my setup, and had to go back through everything and wrap and then I decided drain my setup. Root Rot can be a killer, I drained m system completely, and vacuumed out all the water, and refilled with with 1/4 strength nutes, I believe my ppm was 230 or so, and the plants have been loving it. I have been you using
Hygrozyme for 2 runs, and it seems to help out in a big way with the bacteria. I think within a couple of days of this you should see improvement. Keep us updated,