Bio-Nitra Clear is a concentrate of live, beneficial organisms specially selected and developed to handle the disposal of wastes. Unlike other products Bio-Nitra Clear is able to reduce nitrates and phosphates and able to reduce sludge build up, by accelerating the natural biological function of a pond or aquarium. Until now there has not been a live bacteria liquid product aimed at nitrate and phosphate removal. Although Bio-Nitra Clear does not kill algae it starves the algae , which then dies off.