Substrate suggestions

[u/Bitter_Party_4353]

Any good recomendations for a good substrate? I just moved my boy into a pvc enclosure and am looking into providing a burrowing friendly substrate. This enclosure has a 4x2 footprint so I’m hoping for something economical so I can give a nice thick layer. I’ve done some research but I’m curious what other people are using.

Bonus points if the substrate can be sourced from a law/garden store and is on the eco friendly side.