If your old filter cartridge for your Pentair Clean and Clear Plus 520 filter system is ready to meet the trashcan, be sure to replace it with the Pleatco PCC130 Filter Cartridge. Reduced pore size distribution in the fabric provides the best flow you can get for your pool and evenly spaced weld spots make the fabric of the filter much stronger than the competition. When it's time to clean out your cartridge, know that Pleatco's filter fabric returns make to it's original form. Choose the filter that will last longer and filter more. Choose the Pleatco PCC130 Filter Cartridge.