Rena Bio-Chem Zorb Filtration Cartridge for SmartFilter Aquarium Filters, 3 Count
The ultimate filtration medium for crystal clear water. Bio-Chem Zorb removes organic aquarium pollutants, including colors, odors, heavy metals and toxic gases as well as other compounds that carbon alone cannot remove. Bio-Chem Zorb also removes light blocking impurities for improved growth of corals in saltwater and plants in freshwater aquariums.