The 3D reef background from BioBubble is a natural-looking and realistic looking molded Image for your aquarium. It offers a unique alternative to traditional textured backgrounds and is an inexpensive way to improve the look of your aquarium. The revolutionary, flexible material makes it easy to apply and remove, and corals colonize easily on it. This is a popular choice for reef tanks and other marine environments. However, be sure to follow the instructions carefully to get the most out of it.