Cartridge Filters: Unlike Sand and DE filters, Cartridge filters do not need backwashing. Cartridge filters remove particulate down to about 8-10 microns in size
Sand Filters: The most common form of pool filters are sand filters. Sand filters remove debris down to about 25-30 microns in size, but by using advanced filter media such as Zeo Sand, sand filters can remove debris down to about 5-8 microns in size