I started my first group of seedlings about two weeks ago. I put one group in vermaculite and the other in perlite in those burpee fiber pots. The seedlings are growing well and look healthy enough but there are small whitish patches on the burpee pots that look a little like mold. Is it alright to transfer these seedlings into my aquaponic unit?

In fact, I have always had a terrible time starting seedlings that don't end up with these little mold like patches on the pots. They always transfer fine into my soil beds but now I'm unsure about using them in my aquaponic unit.