This National Geographic Marble White Reptile Sand substrate helps keep waste away from desert reptiles, creating the look and feel of sand found in their natural environment. The sand's nonabrasive texture makes it more comfortable to live with and to change when needed. Only at PetSmart. Features: Helps mimic the natural environment of desert reptiles Material: Quartz Sand Environment Type: Desert Species: Reptiles Color: White Package Weight: 10 lb (4.5 kg) Cautions, Warnings or Side Effects: Do not flush substrate in toilets or dispose of it outdoors in gutters or storm drains. Used substrate is not recommended for garden use. While this product is nontoxic, you should seek immediate veterinarian care if your pet consumes large quantities or if there is a change in your pet's food or waste consumption. Directions: Pour the substrate into your pet's enclosure to the desired depth (typically 1-2 inches). Some reptiles like to burrow- consult a pet care guide to learn more about your specific reptile. Spot clean daily. Completely change the substrate every 4-6 weeks, or as needed.