The High Capacity Carbon Block Filter Cartridge is designed to enhance your reverse osmosis or reverse osmosis deionization (RO/DI) system's performance by providing superior filtration for saltwater aquariums. This filter cartridge, featuring high-purity coconut shell activated carbon blocks, effectively removes chlorine, fluoride, pesticides, herbicides, and other volatile organic compounds that can negatively affect water quality. With a capacity of up to 12,000 gallons at 2ppm chlorine or 24,000 gallons at 1ppm, this cartridge offers four times the lifespan of standard carbon blocks, ensuring cleaner water for longer periods without frequent replacements.