The Aqua Della mini animals are a set of 6 different cartoon animals. The huge eyes give the animals an adorable cartoon look. They are made of polyester resin. This decoration is completely non-toxic and does not affect the biological balance of your aquarium. 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 lukewarm water. Instructions: Carefully remove decoration from box and rinse with lukewarm water. Caution: Do not use soap, all-purpose cleaners or other cleaning products (e.g. hydrogen peroxide, thinner, turpentine).