Decorative Aquarium Ornament.This aquarium ornament is a naturalistic Aqua Della decoration made of polyester resin. It is completely non-toxic and does not affect the biological balance of your aquarium. The decoration is suitable for both freshwater and marine aquariums. 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). Features: Made of high quality polyester resin. Non-toxic and pH neutral. Does not affect the biological balance. For freshwater and marine aquariums. Instructions: Carefully remove the decoration from the box and rinse with warm water.