Its not like it going to cost you a ton of money to switch to a safe substrate like tiles, they will last you a life time unless
you break the tile becuase i dont see how a lizard that could way less then its flooring is going to break it especaily rock

If anything it will save you a ton of money becuase if you some how manage toget by without any impactions it will cost you a boat load in new bags of sand ( AKA Death in a bag )
Defently great point

, not only are you saving your leos life but saving lots of money but not using sand, calci sand is like $8 a bag, and playsand is like $4 a bag. I dont pay anything for newspaper, paper towels are cheap, and slate or tile can be washed and reused.