The Crushed Coralis a quality product that is perfect for filtering and decorating your fish tank. Made from coral bone, the medium-sized design is ideal for creating a beautiful and natural-looking environment for your aquatic pets. With its efficient filtration capabilities, this crushed coral ensures a clear and healthy water environment. Features -Color:As Shown -Material:Coral -Size:3.00X3.00X0.50cm/1.18X1.18X0.20in - Using naturalcoralmaterials, can purify water quality, adsorption harmful substances, convenient. - Can remove excessive food, fish debris in your aquariums water and fish tank effectively. - Make it a good habit to replace it regularly so that these things won't cause any problem for a living environment. - Fine material and highly efficient filtration of impurities in water, conveniently. - Purify your fish tank with this high density filter media, a nice helper for you. Packing list1 x bag of crushed coral