The substrate is called Zilla Desert Blend, btw.

EDIT: Quoted: "ESU (Zilla) Desert Blend Lizard Litter is a sand substitute developed for desert-dwelling reptiles. Made from ground English walnut shells, it is harmless if ingested and will easily pass through the reptile's digestive system. It is nontoxic, less abrasive and dust free."

Brandon, I trust you in your judgment but are you sure that it's unsafe to use?