You can now bring the worldâs most exotic reefs into your home with CaribSeaâs Arag-Aliveâ¢ substrates. It is developed from CaribSeaâs cooperation with public aquariums and zoological parks, where authenticity is a must. Arag-Aliveâ¢ 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-Aliveâ¢ contains millions of bacteria per pound specially engineered for aggressive waste reduction in closed systems like your aquarium. Arag-Aliveâ¢ is engineered to suppress ânew tank syndromeâ and compress the ammonia cycle. It begins to cycle your aquarium instantly. In fact, independent labs prove Arag-Aliveâ¢ cycles your aquarium days faster than other brands.