Aqueon Pure LIve Beneficial Bacteria and Enzymes for AquariumsAqueon Pure Bacteria Supplement contains live beneficial bacteria and enzymes. Aqueon Pure is the solution for aquarists who want to bring balance to their aquarium with the convenience of simple dosing and a blend of bacteria plus enzymes that breakdown excess waste. Pure provides an easy to dose nitrifying bacteria supplement to maintain a well balanced aquarium. Nitrifying bacteria live on surfaces such as filter media, d? cor and gravel,