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.

• 1 bag treats 210 litres of water for 3 - 6 months