I wouldn't have used h202 if there was any other choice. I didn't have any other bigger pots until yesterdays. The root balls were to big to put them in the same container. And with in 12 hours white mold spreaded to 3 plants. Thank you for your help thhough.1) don't use H2O2 in soil...it kills the bacteria you need in the soil...
2) looks like nutrient solution splash...