I've never experienced root rot in soil. I'd say the soil you had was contaminated if this was in auto pots.
quicker to the draw.
although since i am here browsing around.
i recently switched back to coco since i had some serious root rot on 3 plants in a row, like the worst smelling rot ever.
very likely it was shit in the soil soaking that started it, not the bottom feeding.
is there anything you do to help prevent this? or is this more a product of fox farms?