mold

I just trashed a whole grow due to root mold
now my 6 week old clones that are in 4 inch cubes some have white mold on the cubes how can i get rid of this i have h peroxide and defender fungi spray the grow shop said neither will work any ideas on what to buy thanks

wow, thats another issue that i just ran into also..
i was checkin the bottom of my cubes (4" rockwool) and i spotted some white shit that kinda looked like mold.. if i have to throw them all away i'll puke

someone help usss