The LK is screwing you up. Im kind of in the same boat as you. I noticed that the plants that received LK and Hygrozyme got discolored roots, it seemed as if the particles got the roots to stick together, instead of the fishbone look they all got together, slimed and died.
I tried 10 gal buckets, foil taped, black taped etc.
Best lesson learned: Use 5 gal buckets with the large net pots and the following nutes: GH micro, bloom PERIOD.
Ph down and tap water.
I just cant justify switching to dirt, im on the second story of a condo, its easier to haul water from the faucet 5 feet away

Either way good luck friend, but I would give hydro one last shot. I just love to see root porn
Cheers