Aqua Della Coral consists of 8 base reefs and numerous corals of varying sizes, shapes, and colors. This decoration is made of polyester resin. Combine these reefs and corals to create your own Aqua Della reef, perfectly suited to your aquarium. The corals are reproduced as faithfully as possible to their natural counterparts. Corals in the same color as the reef are also available for those who prefer less colorful decorations. With their neutral pH, these corals will not bleed color and can be used in both freshwater and saltwater aquariums.