The CircuPool® CJ-90 Cartridge Filter captures more impurities for sparkling water clarity, without the need for supplemental media or backwashing. The filter body's unique design is compact, durable, and convenient. Its small 10-inch diameter footprint allows it to easily fit on to crowded equipment pads, and its design allows energy-efficient flow and can also save thousands of gallons of water by eliminating the need to backwash. The CJ-90 contains 90 sq ft of filtration surface area, which can handle swimming pools up to 12,000 gallons. When paired with the CircuPool® TJ-16 Typhoon cyclonic pre-filter, it can handle pools up to 18,000 gallons. Best of all, crystal-clear water is virtually guaranteed.