Pentair Clean and Clear® Plus CCP520 520 SqFt Cartridge Filter 150 gpm. Clean and Clear Plus Cartridge Pool filters have a corrosion-resistant, injection-molded, fiberglass-reinforced, polypropylene filter tank featurig superior strength and reliability. The cartridge assembly uses four, nonwoven, polyester cartridges. There is no need for backwashing. Simply remove the cartridges and rinse with a garden hose, reducing water consumption.