Discover Bestway Filtration Balls for Sand Filters: Efficient and Durable. Replace the sand in your sand filter with the innovative Bestway Filtration Balls, designed for more effective and efficient pool water filtration. These balls are an essential addition for anyone with an outdoor pool. Efficient Water Filtration. Made of 100% PET, these lightweight balls provide superior filtration comparable to 18 kg of sand. This results in clearer water and improved performance of your sand filter pump. Easy and Economical. Weighing only 500 grams per pack, these filtration balls are much easier to handle and transport than traditional sand. They are also economical, last 3-4 years, and can be easily machine-washed without losing any filtration capacity. Features: Material: 100% PET Effectiveness: Equivalent to 18kg of sand Application: Sand filter pumps Ball diameter: 5cm Weight: 0.5kg Weight with packaging: 0.8kg Keywords: Bestway Filtration Balls, Sand Filter Alternative, Sustainable Water Filtration, Lightweight Filtration Balls, Reusable Filter Balls.