Just soak the brick in water, coco coir will instantly and easily soak up water and expand into a clean, fluffy substrate. ✨ 10LBS Natural Coconut Fiber Substrate for Reptile- Premium Compressed Coconut Husk Terrarium Bedding for Reptile, Tortoise, Frogs, Snakes, Hermit Crabs, Burrowing Animals ✨.