You can now bring the worlds most exotic reefs into your home with CaribSea`s Arag-Alive substrates. It is developed from CaribSea`s cooperation with public aquariums and zoological parks, where authenticity is a must. From the alluring black sands of the Indo Pacific to the bright white oolite of the Bahama Banks, and the uniqely uniform Fiji Pink Arag-Alive has you covered with exotic microcosms to choose from.  Beauty and Brains. Arag-Alive helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae. Arag-Alive contains millions of bacteria per pound specially engineered for aggressive waste reduction in closed systems like your aquarium. Arag-Alive is engineered to suppress "New Tank Syndrome" and compress the ammonia cycle. It begins to cycle your aquarium days faster than other brands.  Dont compromise, Arag-Alive has it all.