Back in March my friend rescued a young leopard gecko who had been abused, and asked me to take care of the little guy as his apartment doesn't allow pets. I've been told that this leo had been kept on sand during his period of neglect but he refuses to set foot on sand since I've had him, he will stay on top of his hides and not move until I take him out. So I've switched him to reptile carpet and now he explores his tank and will sleep under his hides. I also upgraded him to a 12 gallon tank (he was in a small plastic container) with two hides, a water dish and a small dish full of calcium powder. I've seen a lot of heated debates on keeping Leopard geckos on substrates that they can burrow into and was wondering if shredded paper would be considered okay to use, if i need to put him on something else or can continue to use the reptile carpet?