High-efficiency -level Filtration: Made from high-quality polyester fiber, these pool balls for swimming pool provide filtration accuracy down to 0.8 microns, effectively removing fine particles, suspended matter, and impurities from pool water. Compared to traditional sand filtration (20-40 microns), sand filter balls offer stronger Easy Installation, Low Maintenance: Simply replace the traditional filter sand with pool filter balls to complete installation, with no complicated steps required. The internal structure offers excellent water permeability with a porosity of up to 98.5%, compared to only 35-45% for sand filters. The higher porosity improves water circulation 3.1 lbs Replaces 120 lbs of Filter Sand: The 2026 upgraded pool filter balls are specially designed to replace traditional sand filter media. Just 3.1 lbs of filter balls can replace approximately 120 lbs of filter sand, greatly reducing weight while improving filtration efficiency. and easy to handle, one person can easily install Washable and Reusable: and structurally stable, the pool filter balls can be machine-washed or hand-washed and reused after cleaning. They can last for multiple pool seasons. A mesh laundry bag is included for convenient cleaning or storage. Compared with disposable filter sand, they save both time and maintenance costs while being more Wide Compatibility: The new blue pool filter balls offer better filtration performance than the previous white version and are compatible with most pool sand filter systems, including above-ground pools, in-ground pools, and commercial pools. They can also be used in aquariums and other water circulation filtration systems ensuring stable efficient