Used to kill harmful bacteria and algae . Increases oxygen supply while generating ozone . It works even better with a protein skimmer or high polymer filter . Producing ozone from ambient air, suitable for aquarium and pond . Providing clear and healthy water for your fish, reducing the microbial load in water. Highly reducing the Nitrate, Ammonia and pollutants in water. Improving the oxygen content of oxidation-reduction potential in water.