Material of swimming pool filter ballsThe filter balls are made of recyclable polyethylene, lightweight material, high permeability, non-toxic, strong adsorption capacity and long service life. Weight : 1400g, can replace swimming pool filter sand. Significant filtering effect Filter balls for easy and quick cleaning of the swimming pool. 4 times faster filtration speed than traditional filter media, higher recovery capacity. It can capture tiny suspended matter, also filters grease from water Durable and energy saving Pool filter balls can be washed and reused. Save energy, costs and other swimming accessories. (Tips: Place the filter balls in a laundry bag and machine wash them) Widely used The filter balls are not only used for swimming pool cleaning filter system, but can also be used for water filtration in aquarium, swimming pool, filtration pump, aquarium and even draining.