Only CaribSeas Aragalive contains not just the broad spectrum of natural marine bacteria found in the ocean, but additional specially selected strains of marine bacteria as well. Aragalive helps control dangerous ammonia levels and reduces nitrate and nitrite. Aragalive creates a natural biological balance, and makes cycling a new aquarium faster and safer. Available in 6 different environments for use in all marine and reef tanks including Plenums, nitrate reduction beds, sumps, fish tanks, and more.