Phosphate remover is a simple and effective way to remove phosphates from saltwater aquariums. Most reef aquariums will need removal of phosphates due to food, water sources, and fish waste. High phosphates encourage algae, cause browning of corals, and slow down coral growth. Regular use of phosphate remover increases color and growth of your aquarium's inhabitants. This product binds phosphates with lanthanum to form lanthanum phosphates. Phosphate remover should be added slowly near a skimmer or filter sock to help remove the lanthum phosphate.