The 32-250-20-MATRIKX CTO carbon block filter cartridge is the new and improved replacement cartridge for the Matrikx CTO Greenblock filter cartridge. It is the undisputed value leader in cartridge-based carbon block filtration technology. Outstanding filtration capabilities at an affordable price point make this cartridge an easy choice for a huge variety of applications including dechlorination, reverse osmosis pre-filtration, food and beverage, residential drinking water, and many many others. The new features include chloramine reduction capacity and 50% more chlorine capacity.