Pool Filter Replaces Unicel Filter Cartridge for Swimming Pool and Spa Pool Filter Replaces Unicel C-7367, Pleatco PDO75-2000, Filbur FC-3059 Filter Cartridge for Swimming Pool and Spa (This replaces Unicel and NOT a Unicel brand item) Pre-Filters allow for quicker water balancing with fewer chemicals. Washing a filter will extend its life &amp; clean filters use less energy. The Jet Brush makes this quick and easy. Scum Magnets prevent scum andoil from making it to the filter for fewercleanings.