Should I be concerned about this mold?

[gjjdemarco]

Hello all,

I am new here as well as new to hydroponic gardening.

First of all, thanks to all the members here who I have used as inspiration for building my first ebb & flow system. I will put together some pictures and particulars soon.

I am hoping some of you pros out there could tell me if I am being overly cautious though about some mold.

Situation is as follows: I have a bunch of pepper plants in an ebb/flow tray. Well lit, low heat. 6" net pots that get their water automatically once/day. fills to about 5" level of the 6" pot.
The growing medium is 2/1 perlite/vermiculite, then mixed 4/3 hydroton/PV mixture if that makes sense.
Plants seem to be growing accordingly, but I noticed today that I see some green on my medium. Noticeable really only on the perlite as it is white.

I don't have very good air flow though as it is in my garage and it has been incredibly humid around here the last couple weeks.

I plan on getting an oscillating fan on a timer to run about 15 mins every 2 hours or so. Will that help? Should I be worried?

Sorry for the long post.