Reef Builder Sponge Coral Fish Tank Aquarium Ornament 

Each Reef Builder Corals are realistic in form, vibrant in color, durable, soft, and flexible. They are easy to clean and will not fade, off gas, harden, crack, or fracture. Reef Builder Corals are non-toxic and completely safe for both freshwater and saltwater aquariums. Simply choose your choice of corals and plug them into a Reef Builder Base. Voila! You have a beautiful coral reef that will make your aquarium the centerpiece of your home or office.