CaribSea's Nano Reef Kit includes 2 LifeRock Nano Arches plus 1 small Original LifeRock dry rock piece. LifeRock is infused with spored bacteria to aid in biological performance, along with millions of micro and macro passage ways. Creates a mature looking reef instantly and is 100% safe for all marine animals. Each piece of LifeRock mimics natural coralline algae and promotes a healthy aquarium environment.
