Premium Material100% polyethylene, this is the material of the Pool Filter Balls. Pool filter sand is easier to use than large sandbags. The garbage collected from the pool filter sand is certainly a lot easier than your excavation for over an hour.Swimming pool filter ball can also absorb minute particles than normal filter sand Greater cleaning ability; because the internal structure of the filter is finer than the sand of the filter, it can be filtered out of a small substance. The sand filter can usually only filter about 40 microns and our new generation of Sand Filter Balls systems can filter 1 micron substance with filter balls and the filtrate velocity is 3-4 times of conventional filter media Environmental friendly and durable: Swimming pool filter balls have high sharp capacity, very durable, there is less anti-washing process, can be cleaned and cleaned, without aggressive, reusable for many times. 1000 grams of Media Filter Fibers are sufficient to replace 35 kg filtered stone sands. Now use a new generation of Pool Filter Balls to replace sand The range of applications is wide: These spheres of Sand Filter Balls are suitable for filtering in swimming pool and aquarium, Alternatively instead of filtering sand. Swimming pool filtration Suitable for filtering, filter tanks, swimming pools, etc., which can filter effectively remove small suspensions and improve water quality. Pool Filter Balls Suitable for all sand filter systems