Aqua Della mini-animals is a set of 6 different cartoony animals. The huge eyes give the animals an adorable cartoon-like appearance. They are made of polyester resin. This decoration is completely non-toxic and does not the biological balance in your aquarium. The decoration is suitable for both freshwater and marine aquariums Instructions: Take the decoration carefully out of the box and rinse with tepid water. Caution: do not use any soap, all-purpose cleaners or other cleaning products (e.g. hydrogen peroxide, thinner, turpentine).