Underwater Treasures brings you this fun and fantastic Sunken Medallion aquarium ornament to help you build your dream custom aquatic environment. These incredibly realistic decorations are hand-crafted and painted using only the highest quality materials. Underwater Treasures ornaments are all non-toxic, and safe for use in both freshwater and saltwater aquariums. The Large Aerating Sunken Medallion, which includes built-in airline tubing for creating a bubble effect