Lol yeah no not the roots... I mean the stuff that looks like white powder, tiny little specks clumped in spots.
My guesses were bacterial colonies from the
voodoo juice maybe, or mold, or worst case, RA eggs/exudate. I also have a bit of this on the surface of my fabric potted plants in
promix too. I've searched for any RAs though and not found a single one so that seems an unlikely explanation.
I havent added any fungal bennies at all so if its mycos or something, im not sure where it would have come from.
It's also on the bottom of the block I took out with the dead plant in it that never rooted. Seems to run in a line down the center of the block where it contacted the drain tray. Which is why I thought maybe mold.