High Quality Material - This sand filter filter ball is made of polyethylene, which has the advantages of high filtration intensity, fast filtration speed and long service life. The filter has good resilience and it is also reusable High Adsorbability - Because the filter ball has a finer internal structure than filter sand, it can filter grease and fine dirty particles, thus making the pool cleaner. Its filtration speed is 3-4 times faster than traditional filter media Better Filtration and Durability - The filter ball with ultra-high dust holding capacity can replace filter sand, filter in glass and other filtration media. Our advanced 1000g filter ball could replace 36kg filter sand and extend filter life and is more energy and time efficient Durability - The spherical fiber filter can be reused because it can be washed in the washing machine without caking. The swimming pool filter ball is non-toxic and its material can be recycled, which is environmentally friendly Widely Applicable - The filter ball is widely used in various sand filter systems, and it Also suitable for salt water sand filter pumps. In addition, it is very suitable for swimming pools, filter aquariums, filters, filter buckets, filter pumps, aquariums, etc.