ProRep Straw Bedding can be used for tortoises as well as many other large snakes and lizards that originate from arid habitats. It is made from compressed straw pellets to provide a soft bedding that should not cause impaction if eaten. Directions: Spread the substrate evenly over the bottom of the enclosure to a depth of at least 1-2" (2.5-5cm). Spot-clean daily and completely replace every two or three weeks, or more frequently if it becomes heavily soiled or wet. This substrate should not be used wet. If you are using an under-tank heatmat as your heat source do no use a thick layer of Straw Bedding as this may cause the heatmat to overheat. Please refer to the heatmat manufacturer's instructions for more information.