Your pool filter is one of the most important parts of your system, keeping water clean, clear, and safe for swimming. Whether you have a cartridge, sand, or DE filter , the media inside doesn’t last forever. At Infinity Pool Solutions , we help homeowners recognize when it’s time to replace filter media — before it starts affecting water quality or stressing your equipment. Let's dive into the 5 major signs to change your pool filter media. 5 Common Signs Your Pool Filter Me