Breath-taking aquarium backgrounds boast unsurpassed realism Handmade and hand-colored backgrounds for exceptional aquascapes Simple and effective way to enhance the appearance of any aquarium Unparalleled realism instantly transforms your aquarium into a breath-taking habitat. Universal Rock Aquarium Backgrounds are natural-looking artificial rock backgrounds molded from real rock outcrops. Each background is handmade and hand-colored using crushed rock and sand - no paints are used! The result is a unique, three-dimensional background that offers a simple and effective way to enhance the appearance of any aquarium. Made with a revolutionary flexible, yet rigid, material for convenient installation. Use 100% silicone sealer for installation. Style Dimensions Olgas 72" x 24" Canyon 48" x 24" Shelf 24" x 24" Mini Crevice 14" x 14" Crevice 24" x 16" Crevice 36" x 18" Crevice 48" x 18" Wash your new rock background before installing into your aquarium. Please click on "More Information" for installation guide.