The Aqua KleanTM filtration system is revolutionary. Instead of using paper or ceramic cartridge filters, Aqua KleanTM uses cloth filters. These cloth filters are designed to be paired with Mega Flow filter frames. This design allows for 100% of water to pass through the filter, rather than just 30% on traditional spa filters. More filtration means cleaner water. The 40 micron cloth used in Aqua KleanTM filters is eight times thicker than regular filters. Cleaning these filters is easy. Aqua KleanTM filters are machine washable, so there is no longer a need to scrub with a hose or pre-soak the filters before cleaning. To clean, simply toss the Aqua KleanTM filters in the washing machine with 3 Tbsp of bleach.