Our Shell Stone Ecoscape rock is not only an artistic choice for the home aquarium, but also a safe choice for both fish and plants. Shell Stone is a fossilized sedimentary stone found in North and Central America, making it a great choice for new world cichlids that inhabit those areas. Its gorgeous formations can be viewed for hours, and you would still be able to find new features. It is inert and will not alter pH or hardness. It comes in a variety of shapes and sizes handpicked by the Ecoscape team to give your aquarium a unique look.