do these root riots have powdery mildew?

[GF-Z]

If you are talking about the same shit in my pictures,,NO It's NOT!!!!!! ,,,dont assume its nothing to worry about like i did initially,,, that mushroom I saw is a fruiting body from white mold (Sclerotinia sclerotiorum),,,it's not beneficial fungi and it's not something to ignore,,it becomes systemic and could well ruin someone's life who keeps mothers

boil them cubes if you are forced to use them,,, dunk in strong hypoclorous acid if possible ,,h202 ain't strong enough to kill it without putting crazy amounts in a pre soak

Or just use aero-cloner with h2o2 / pool-shock added and forget those problems ...