Cornerstone Reef Rock is the new standard of premium live rock alternatives. Build the seasoned look of a reef instantly with a rock that is not only friendly to the environment, but has the looks to match. Each piece of rock hosts an intricate web of micro pores that provide unparalleled micro-porosity enabling maximum colonization of nitrifying bacteria, enhancing system stability. This is done by blending inert materials into the rock in such a way that creates a product that is strong, yet light. Features * 2X volume to weight ratio compared to other rock * Unparalleled microporosity to maximize bacterial colonization * pH Neutral * Will not leach nitrates or phosphates * Many unique shapes and sizes