This goldfish is an ornament of the Action Air Air D`aqua della series. These caricatured animals have a pipe to be connected to an air pump. This pump promotes water oxygen level and produces bubbles to pretend animals were blowing them. These thematic ornaments are standardized to reproduce this atmosphere as faithfully as possible. This ornament is made of polyester resin. It is absolutely harmless and has no influence on the biological balance of your aquarium. The decoration is suitable for soft water aquariums and sea water aquariums. Indication: Carefully remove the decoration from the box and rinse it with warm water. Please note: do not use soap, universal cleaners or other cleaning products (for example: hydrogen peroxide, diluent, turpentine).