Root Rot?!? AK Auto DWC

Hey guys i have something strange happening on my roots... Plant looks fine but i spoted something strange, i cant tell if root rot or somethink different. No smell at all.
im using GH flora 3 part + Bio Bloom from GH + Im using the GHE Subculture to pervent any slime or rot... maby i overdosage the subculture??
Water temp is 17oC-23oC, PPM is 700 and dropping 50 x day, PH stable 5.6-5.8. adding 1.5L fresh water evry day. Im using tap water but we have good water here, is about 120ppm max, at 6.8ph. This plant is Royal AK Auto @ 1st day 2nd week flowering.
This should help the roots...





Do u think i need any correction/fix or just wait and watch for any detoriation...?

Ok, so what are you saying is wrong or strange?

Sorry maby the light are not the best to see, but in the red circles is a darker spot on the roots...

Maby i need some enzymes like Cannazym? I do not use any enzymes and i do not change water in ress. The subculture keep slimes and fungi away but think i need somekind of enzymes to remoove dead roots... The GH dont have any product to klean dead roots, instead they have a biofilter but i cant use it in this setup cos i designed to use it in main tank for RDWC but i have single bucket setup (DWC).
Im wondering if i can use Cannzym with my other GH products (flora 3 part series)...

It could be from a lack of oxygen, or some bad organisms in your water. I've been around a couple DWC grows. Everytime micros were used i noticed slime and/or root rot. your roots look relatively white and healthy thus far. I'm a fan of Al B Fuct, he used H202 for aeration and to combat root rot. Some say H202 harms plants, but IMO it doesnt do any more damage than root rot would. Al B says the only organic matter in your rez should be your roots. I tend to agree.

Those roots look fine dude. If you had any type of root issue it would cause pH issues right off the bat, and you would likely smell it.