hi i think i gotta little mold problem starting on the bottem of the rockwool theres a bunch of little white dots, and what seems like spiderwebs, but im pretty sure its mold. what can i do to kill this or to prevent it from happing again ..... maybe hydrogen peroxide ???? o ya this is a nft system
be sure what you're seeing isn't roots. many times i've seen tiny root-hairs that looks like a growth of some kind.