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Message: <blockquote data-quote="Eighth Eye Blind" data-source="post: 240398" data-attributes="member: 49683">I've lost plenty of non-decapitated meal worms in enclosures and I've never had any of them mature into beetles. I use 100% coco coir as substrate and I don't think there's enough nutritional value in coir to allow them to pupate and morph. They starve before they mature.I suppose it could happen in other substrates with more decaying matter in them. On coir, though, the development of beetlemania doesn't seem to be a threat.</blockquote>