A rock heaters function is to facilitate digestion.
A rock heater should never be the sole source of heat.
Never cover or bury the rock heater with anything.
Zoo Med Repti Heat Cave is designed to provide a secure, heated hiding place for all small lizards and snakes. The top of the cave is heated with elements projecting heat both upward and downward into the cave. As your reptile grows, the top can be removed and used as a rock heater!