Seedling rockwool has white fungus spots starting... how bad?

Zorak

Member
I had some rockwool cubes with some new seedlings in plastic bags and now i can see fungus starting to grow on the rockwool. I am moving them to my dwc tanks but I am wondering if i am in for trouble? i plan to cover the rock wool with styrofoam and wiped off the white spots on the rockwool.
 
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