Mold on soil

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I have mold, or fungus, or I don't know, but it's there. It is only on the soil and mostly just on the original jiffy cube. Should I be worried? Is it the stuff that only feeds on dead material, or will it spread to my plants? Should I just scrape it off? Should I use peroxide, or a baking soda solution? HELP. This is my first real grow. I hate mold.

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[fasts102376]

do u have a fan?

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I have an exhaust fan in the top of the box, and the air that gets drawn in through the intake holes blows across the plants. Also, I always let the soil get nice and dry before I water.

Oh, well. It is a moot point now as I have discarded the the two plants that had it. My best growing female did not have, so I have stuck her in the flowering chamber after taking a couple of clones off her.