IMO floor tile makes the best substrate--stone, ceramic, or vinyl; it's easy to clean & sanitize, and with proper cleanup, won't absorb odors. Stone & ceramic can also help keep claws/nails maintained.
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!