They are not feel slimy but twist and lose branches in areas they go brown, visible on photos, that’s why it catches my attention. Upper part and leaves looks good instead one that got white roots)) I got no access to hydro guard but I use pyranha and voodoo juice together. I think I can’t replace the system now because its too large to change it during the growing, I will replace it only with the plants if the will go too bad I think 🤔