My lil' Russian Tort seems to be doing fine short term with Repti - Bark and coconut coir. Any health problems or potential hazards I should worry about. He also tends to bury any of his food he hasn't eaten. Apparently it does keep the food cooler than the tank and not dry. Is his enclosure also big enough? It is 2 1/2 ft L x 1 ft W x 1 ft H.