The Aqua-Polish matrix is rated at 3 micron retention which is small enough to physically remove microscopic and visible dirt and scale sediment, and many other larger particulate contaminants. Aqua-Polish cartridges provide maximum flow rates and capacity while remaining superior to many other filtration products in effectiveness. Aqua-Polish cartridge is a filtering device, not intended to remove microbiological contaminants. Avg. Capacity: 9500 ltr Part Ref 26641