3.0 lbs Pool Filter Balls - Fiber Filter Media for Swimming Pool Sand Filters (Equals 100 lbs Pool Filter Sand) - Higher FiltrationTwin 1. 5 Pound packs of eco friendly fiber filter media balls for use in pool sand filters. 3. 0 lbs. of filter balls are equivalent to 100 lbs. pool of filter sand. The ideal replacement media for traditional filter sand, as the fiber filter media balls provide higher and more efficient water filtration. The eco friendly spherical filter balls are made of polyester, polypropylene spherical filter, and acrylic fiber. This enables them to filter out