Chemi-pure Blue is a revolutionary new filtration media that is designed to adsorb nitrogenous organic molecules, along with phosphates and to some extant even nitrates much faster, more efficiently, and for a longer period of time than other aquarium filtration media available. Chemi-pure Blue uses the finest laboratory grade resin technology to rapidly remove organics and phosphates from your aquarium water while raising redox and helping stabilize pH. Chemi-pure Blue's unique formula is the finest marine aquarium filtration media available for a healthy, stable, crystal clear marine aquarium!