These eco-friendly fiber filter balls are a sustainable alternative to sand for swimming pool filtration. Measuring just 3.1 lbs, they have a surface area equal to 100 lbs of sand, making them highly efficient at trapping debris without compromising water flow. Made of non-abrasive fibers, they won't scratch surfaces or damage equipment like sand can. Just drop them into your filter and forget about backwashing for weeks - the balls won't compact over time like sand tends to. Help keep your pool water crystal clear with these low-maintenance filter balls that provide superior filtration without the hassle of heavy sand.