♥ High Efficiency Filtration: Dljingan filter balls are made of polyester and modified fibre, features high-precision filtration, strong adsorbability and high filtration rate. Their unique three-dimensional structure provides a large surface area and pore structure, which enables the filter balls to efficiently filter and adsorb impurities. ♥ Machine Wash & Reusable: The sand filter balls are easy to clean and can be reused several times. You can wash them in a washing machine, which is a great cost-effective and time-saving solution. Tip: After washing, the filter balls should be dried naturally, not in a tumble dryer. ♥ Keeps Your Swimming Pools Clean: The pool filter balls have a 99.9% adsorption rate, which effectively adsorbs tiny suspended solids and filters down to 5-3 microns of impurities. Let you and your family enjoy a clean and refreshing pool all season. ♥ Widely Applicable: The filter ball is compatible with all kinds of pool filters, including sand filters, cartridge filters and DE filters, suitable for swimming, aquarium and fish tank. It's a great replacement for traditional pool filter sand, with each 1.5 lbs filter ball being equivalent to 50 lbs filter sand. ♥ 12 Month Guarantee: Dljingan provides 12 month replacement service at no extra charge, if you have any questions about the Dljingan pool filter balls, please don’t hesitate to contact us through Amazon message. Our reliable and effective filter balls are the perfect choice for your sand filter, ensuring optimal filtration performance. › See more product details