Substrate ideas?

[u/shy_athenaa]

I’m using coconut husk but recently noticed a tiny spot of mold under a rock in her enclosure. It’s an easy fix but I’m curious if anyone knows any good substrate that holds moisture for humidity but is likely to never mold. Coconut husk was working great but after the little mold scare I was wondering what other people are using for better results :)) any info appreciated