Carbon-PURE™ is a super efficient superior bituminous coal based carbon that is phosphate-free and adsorbs impurities, organics and pollutants. Resulting in crystal clear, pure water.
--Use 1 cup (240 ml) of Carbon-PLUS™ for every 100 gallons (380 liters) of water. Product will last several months depending on aquarium conditions. Rinse well before use. Place in filter bag and place bag where there is good water flow. For best results, place AFTER good mechanical filtration. Fine to use in all types of filter systems.