Unique Design: Our innovative foam pool filter balls adopt a three-dimensional honeycomb structure. This special spherical shape acts as an effective pool clarifier, capturing grease, moss, sludge, and impurities for crystal-clear water. Enjoy a perfectly clean spa bath with complete peace of mind. Effective Absorption: Pool sponge made of high-performance material, these filter balls permanently retain oily residue. They relieve your sand filter, improve filtration, preserve water quality, and extend the life of your spa. Reusable and Washable: Our pool filter ball is easy to clean with a Water or machine wash. Absorbent pool sponge after wringing and rinsing, a simple air drying makes it ready for a new use, economical and ecological Wide Range of Applications: Ideal pool sponge for spas, swimming pools, water lily pool, spa filter ball, bathtubs and whirlpool centers. These spa anti-foam balls can also be used as fun bath toys for children, combining utility and entertainment How