Emperor Scorpions--what bedding do I use?

Can I use the coconut bedding? Or do they use something else?

I use potting soil and eco-earth 50/50 mix. They seem to Luke to burrow and hide. They need a fair amount of humidity so that mix works well for me. Also keep in mind lots of hides if you are keeping a communal tank.

What's husbandry like on these guys??