wasnt trying to flame you dude, its all good........ just telling him my opinion. if your beardie is eating sand its having probs. i think beardies that eat that have a calcium deficency. a little sand isnt a big deal, its the mouthfuls. same thing with the calcium sand, a little wont hurt but if it starts eating mouthfuls then something is wrong. ive heard about impaction probs from just about every kind of substrate. the safest would be your tile, but i would imagine if you had a large tank with a lot of ground area he would have a slippery time running around.... i myself would do sand, or cypress mulch. but thats just me and what i have had success with and no probs. others swear by newspaper...others aspen...its just a matter of preference 