Underwater Treasures Rock Hill - Style CUnderwater Treasures brings you this wonderful line of aquarium ornaments to compliment your 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. Enhance the appeal of your aquarium with any of these exciting decorations! 12. 5 x 6. 75 x 10. 25