New high-quality material: The filter balls for sand filter systems are made of specially treated polyethylene, so they are more durable and can be recycled due to the special nature of the material. Recyclable does not pollute the environment. It has the advantages of high filtration resistance, fast filtration speed, long service life, reusable. Significant filtering effect: They are lighter and more efficient than traditional filter sand. Unlike sand, the filter ball does not clog your filter and requires less backwashing for maintenance. The premium filter media extends the life of the filter and is a perfect replacement for filter sand, filter glass and other media. Stronger Cleaning Ability: The internal structure of the ball filter material being finer than that of filter sand, it can filter even finer substances. Filter sand generally can only filter about 40 micrometers of material, and our new generation of filter balls for sand filter systems can filter 1 micrometer of material, and the filtration speed is 3-4 times that of filter media conventional. Wide application: Filterballs are used universally in various sand filter systems, do not block sand filter systems and are also suitable for salt water. Can filter not only for swimming pools, but also for aquariums, ponds, etc. Applying the filter ball gives you the quality effect of clean and clear water!