Dimart Super Magical Simulation Ancient Stone Castle Tower Landscaping Aquarium Ornament for Fish Tank Faint Yellow Small size stone castle ornament for aquarium & fish tank, made by good craftsmanship. Made of non-toxic resin. Safe for fish. Designed with flat bottom, just put it slently then it can stand in your aquarium easily and steadily. Does not fade, each ornament is made from non-toxic resin material that is safe for your aquarium and pets. Decorate your aquarium all the time with minimum maintenance