overdose, rootrot, hydro dwc, need help

hello im using dwc 15 l, GHE floragro 3partsolution, temp 25-28c, ph 5.7-6, watertemp about the same as roomtemp.

i started experiencing problem with two of them when i switched to 12/12. at this point I had added AN bud candy together with some b52, increasing the EC from 1,8 to 2,0. apperantly they had a lock-out, drinking up the water and leaving the nutes behind. the EC had increased to over 3,6 when i discovered it, od´ing and shocking the plants, because, man, they started to look like freaks. i changed the res to clean water at ph 5,9-6. one recovered after a couple of days, the other one is still shit

BECAUSE THIS BITCH GOT ROOTROT TOO. the once massive, clean white rootball turned brown with this slimy shit surrounding it. and this happend in two days. th´fuck is going on here, is she dying? i ripped off most of the slimy parts and sterilized the bucket. filled it up with water, adding only a little b52. ive read that peroxide might solve the problem, or that shes got some kind of algaebacteriashit. anyone who have had these problems and recovered from it or should i dump the bitch?

(the clear pic shows how she was looking when i first decided to flush it, the others under hpslights is showing how she is looking at the moment. topstems bending in different directions, thin leaves, nasty shit

if she is sharing water with the others def isolate !

watertemps is def the culprit if it's the same temp as the room

Shes in her own bucket. Ill try to cool down the watertemps then, thanks alot!

You have found the biggest problem with DWC, temperature. I like to keep my DWC at less than 20c, I like the air to be at 30c for co2. See the problem? If you want to nail the DWC, you will need a water chiller. Cold water will prevent almost ALL root rot.

You don't need a chiller just freeze a bottle of water and put in bucket.
What are your temps like?

don't put the B-52 in the rez bro, that's where the shits coming from, and the bud candy. forget the bud candy and foliar the b-52

also only stick with base nutes and a booster if hydro, non of the extra bshit

thanks for the help. she is looking better, but still not beatiful