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For an experiment I'm conducting, I need to grow mold on a 2 foot square piece of white fiberglass. I'm in Florida, with high heat and humility, so mold already grows easily. I've seen elsewhere that mold needs organic matter to feed on, to grow rapidly. Ironically, I've seen mold grow on the side of fiberglass motor-homes and showers with no present organic matter. Any suggestions on how to grow mold rapidly on my piece of fiberglass? I thought of locating fiberglass outside, in sun. I could mist it every hour or 2 to create more moisture. Maybe there is something I could rub/spray on the fiberglass sheet to encourage rapid growth? Any other suggestions about applying moisture, light, etc?

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  • $\begingroup$ Hi Andrew, (great name) what type of mold is it? $\endgroup$
    – Andrew
    Aug 9 '20 at 23:16
  • $\begingroup$ I'm not sure of type of mold. I'm trying to replicate the mold growth which naturally occurs here in Florida, USA. Could be a few species of fungi. Just trying to figure out how to grow dense mold quickly. $\endgroup$
    – andrew5555
    Aug 11 '20 at 8:01
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Mold is a general name for many species of Fungi, which are heterotroph so they need organic material to feed on. You can see them grow on fiberglass because many organic material can accumulate near or on fiberglass (skin cells, plants root hairs, microbes, oils) and become substrate for the mold. If you want to grow a specific mold you should first identify it to find the best substrate for that species and not for other. If you simply want mold you can use some kind of starch on the fiberglass and keep it moist (not wet, wetness will give you also oomycetes and bacteria). No need to spray it every 2hrs. You can close the fiberglass with a box, dark box is better (bacteria grow best with light). You can take (with mask and gloves) some mold and put it on your fiberglass to promote the growing of that mold. Describing your mold or posting a picture can help to identify. If you see two different colors report both of them and location (center, periphery)

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  • $\begingroup$ Thank you. What are some general examples of starches I can use to accelerate growth of mold, densely and quickly? $\endgroup$
    – andrew5555
    Aug 11 '20 at 8:00
  • $\begingroup$ I use potato but any should work. Depending on the Fungi paper of cardobard can be more selective towards it $\endgroup$
    – Hachiloni
    Aug 11 '20 at 15:05

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