Instant Reef Artificial Coral Reef for Aquarium Decor Realistic Looking Artificial Coral Reef Aquarium Decor for Saltwater Fish & Freshwater Fish Tanks. Made of High Quality Resin, Colors are all the way through. Non-Toxic, Safe to fish, invertebrates. Many caves and hideouts for fish to swim through. No Special Reef Aquarium Equipment needed. Artificial Coral Reef Tank is Easy to Setup, Clean and Maintain. Save time & money **WARNING** To avoid Loss of Fish, Rinse thoroughly, DO NOT install more than one decor a day.