So I was wondering, is perlite that isn’t made for reptiles safe for eggs? I was reading the back of a bag of MiracleGro perlite and it has 0.49% fertilizer in it; I just need some opinions 
yes there is perlite without fertilizer and the fertilizer will kill the eggs so don’t use it.
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Thanks so much, I didn’t want to make that mistake
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People get a little pedantic over hatching medium. Don’t stress if you can’t find clean perlite. I put 3-5 wet paper towels under a light diffuser, put press n seal over the tub, load it with eggs and put the lid on and forget it for 50 days. At day 50 I pull the cover. I’ve tried every method except the commercialized hatching mediums like hatch rite and I haven’t found a difference in efficiency in anything. I hatch 15+ clutches a year on $.25 worth of paper towels 
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The paper towels stay moist enough?
If you’re using press n seal (and you should) then it works just fine. I’ve hatched a couple hundred that way so I’d say it’s fine lol. No difference in my hatch rate vs using typical medium.
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Do you provide any ventilation?
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Zero until day 50.
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