Root rot or just top max residue ?

I added some top max to my aeroponics the other day

Today I checked the roots and they look black in places

I had some root issues but dropped my res tank to under 22c and turned my airpump to max and have no problems since

I added some top max the other day as I flipped to 12/12

As I add hydrogen peroxide to my tank every 3 to 5 days although temps may have spiked 2 days ago when I was doing some work on my extract

Anyway just wanted to know if anyone else had used bio bizz top max in a hydro or aero grow and had black grain get onto their roots ?

If it is root rot it`s the fastest spreading root rot I`ve seen 2 days and boom some of my root`s are solid black

I`m going to clean them and clean my whole system and go again with just a blooming mix of nutes and no top max

Any advice would be nice I`ve ordered some zyme think the brand was called "home and garden".

Oh yeah I use the flora range and I also add fulvic acid to it as well as some cal mag I`ve found that fulvic acid and a bit of hydrogen peroxide was keeping my roots really nice

I really hope its just top max and not rot I`m at work now so I can`t do jack about it for at least another 9 hours...............

Cheers for any advice

Dumped the res when I got home cleaned up all the roots and mixed up fresh nutes

There was a fair chunk of old roots in there, after a hydrogen peroxide + water bath and a rinse there was no more black crap on the roots but some of them had started to yellow

Got some zyme coming soon so hopefully that`ll help improve the roots too.