The Posi-Clear' cartridge filter is designed to remove more dirt and impurities, leaving your water ultra-clear and alluringly fresh. And the specially-designed manifold cartridge is even capable of removing suntan lotion and body oils. Rugged ABS Thermoplastic Pool/Spa Cartridge Filter for use on swimming pools and spas, both residential and commercial. As an industry leader in pool filtration, Sta-Rite® has developed the technology to significantly extend the time between cleanings. You’ll spend more time enjoying your pool and a lot less time maintaining it.