One note that I did when using sand, as do most breeders.

I put about 2" of sand in the tank and misted it down really well, let it sit for a few days to dry up and harden. They will loosen some as they run around, but never had any issues.

This has been a debate for years and years. I know breeders that have used sand for 10+ years and havent lost any dragons.

Its a personal choice. I have heard of snakes eating paper towels because the rodent juice was on it. So not all subs are safe.