Superbac Live! Nitrifying Bacteria for freshwater is a highly concentrated solution of Nitrosomonas and Nitrobacter bacteria that will instantly establish biofiltration. To ensure effectiveness, the Nitrobacter efficiently oxidizes nitrite into nitrate after the Nitrosomonas has consumed the existing ammonia. Useful for: new tank setups, adding additional livestock, post-cleaning, post-media change, post-medicating, and whenever ammonia / nitrite imbalances are detected.