* Removes nitrate, nitrite, ammonia and other wastes. * Unsurpassed buffering capability: keep more fish and invertebrates healthier, longer. * Maximum surface area -- up to 10,000 square inches of surface area per cubic inch. * High uniformity coefficient prevents biofouling. * Supports the proper pH of seawater (8.2) with the fastest reaction time. * Precision grading and enhanced internal surface area allows CaribSea Aragonite to deliver more calcium, carbonate buffer and essential trace elements than any other substrate. * Creates a natural biological balance to discourage nuisance algae growth. * Available in the ideal grain sizes (approximately 1-2 mm) for reef tanks, fish aquarium, plenum systems and refugiums. * Pure aragonite -- no tar, harmful organics or impurities. * Never needs replacement -- works with the natural bacteria to enhance performace over the full life of the system. * Ready to use, minimal rinsing required.