Filter balls are the filter balls for swimming pools, as they provide a longer life, do not clog the filter and reduce backwashing. Removes small suspended solids that are difficult to settle, with a higher filtration rate than other filter media (approximately equal to 70 pounds of pool filter). REUSABLE - The product comes with a bag made of high-quality polyester fiber, which is easy to clean and can be washed by machine or directly by hand. HIGH QUALITY MATERIAL: The filter ball is made of 100% polyester fiber, which has the advantages of high filtration accuracy, high dirt interception ability, high backwash cleaning and low water consumption. The granular filter material is a completely filtering material. Wide application: the filter balls are compatible with all pool filters, including , cartridge filters and DE filters, also suitable for aquariums and fish tanks, lighter and more efficient than the filtering, clean water for you and your happy kids swimming, Manufacturer: Bumdenuu