Dimart JF1205 Aquarium Decoration Ornaments Ceramics Tank for Fishes Shrimps Breeding Hiding Spots - Gray High quality, made from special ceramic material which could filtrate the water, safe and non-toxic. Create a natural ecological environment, very comfortable for fishes and shrimps. The hollow caves provides shelter, hiding spots, and spawning sites for fishes and shrimps. Ceramic stones provide a lightweight alternative to real stone in your aquarium. Make your fish tank more interesting. Change your aquarium into a beautiful scenery.