This hidden stone is a good cave for fish, shrimp to breed, play and rest. Betta, shrimp, guppy, snail… will love it. Suitable for small fish, easy to clean, good for breeding nitrifying bacteria which can help improve water. < p>Ceramic material with granite pattern, safe and non-toxic to fish. No fading, no smell. No sharp or rough edges, no worry about scratching the fins. A nice decorative piece, get it to create an environment natural and alive for your aquarium.