1. New high-quality material - The filter ball of the sand filter system is made of specially treated polyethylene, which is more durable and recyclable due to the particularity of the material. Recyclable does not pollute the environment. Filter ball diameter: 50mm to 60mm, weight 700g, can replace 25kg filter and 2. Stronger purification ability - Since the internal structure of the filter ball is finer than that of the filter sand, it can filter out finer substances. Generally, the filter sand can only filter materials of about 40 microns, but our new generation of sand filter system filter balls can filter materials of about 1 micron, and the filtration speed is 3-4 times that of traditional filter media. 3. Sustainability - Since the filter ball is made of specially treated polyethylene and can be reused, it can be washed in the washing machine without clumping. The filter balls are very durable and can even reduce the use of some flocculants. This saves money and effort. 4. Wide range of applications - the new generation of filter balls are widely used in various sand filter systems, and also suitable for salt water. It can be filtered not only through swimming pools, but also through aquariums, ponds, etc.