I have been fighting what I think is root rot for a long time. I am using Hydroguard, I have lowered my res temp to 60F, I have sanitized the system many times, done H202 bathes, run H2O2 in the system, wasn't working so went back to hydro guard. When I clean everything and change the res, the plants momentarily recover and start growing new white healthy looking roots, but In a week or so my ph starts rising rapidly and those roots turn light brown and mushy like the rest. I am thinking about trying a different beneficial microbe additive other than Hydroguard, like maybe voodoo juice. I have also looked at teas, but they seem like quite a hassle. Is this not Pythium, but some other super root rot that can survive at 60F with no light getting at the res and plenty of water circulation? Any info or recommendations would be helpful, thanks.