Aquarium ornament, naturalistic decoration by Aqua Della made of polyester resin. Features: Made of high quality polyester resin. Non-toxic and pH neutral. Does not affect the biological balance of the fish tank. For freshwater and marine aquariums. Instructions: Carefully remove the decoration from the box and rinse with warm water. Instructions: Carefully remove the decoration from the box and rinse it with warm water. Caution: Do not use soap, all-purpose cleaners, or other cleaning products (e.g., hydrogen peroxide, thinner, turpentine).