Why choose us?If you are looking for a practical and versatile filter system for your swimming pool, you should opt for our new generation of filter balls. The filter balls are made entirely of non-toxic polyethylene, can achieve excellent cleaning and filtering effects and can be completely recycled to 100% . 700 g filter balls correspond to a quantity of 25 kg filter sand. Suitable for filtration of aquarium, filter, filter bucket, swimming pool etc to improve water quality.Advantages:New high quality material The sand filter balls are made of specially treated polyethylene, so it is more durable and can be recycled due to the peculiarity of the material. 100% polyethylene, F50mm diameter. 700g filter balls replace 25 kg filter sand.Suitable for all commercially available sand filter systems.Excellent filter resultFilter balls more efficient than conventional sand-based filter media. High adsorption capacity, high water permeability, lighter. Can filter particles of only 1.5 micrometers in the pool water. Effectively filter out fine suspended matter and improve water quality. Light and easy to use Open filter kettle, fill filter container, close container. High pump efficiency, no more sand residue,prolongs. Have a long service life. Are non-toxic and easy to dispose of 100% recyclable Must be polyethylene. Fewer backwash operations (if necessary, just wash with some detergent at 30 water temperature). Help save energy. Wide range of applications The new generation of filterballs is universally used in various sand filter systems and is also suitable for salt water. Can filter not only by swimming pools, but also by aquariums, ponds, etc. Replace the physical filtration and filter sand filtration of filter cotton. Technical data: Color: White Material: 100% polyethylene Quantity: 700g 700g filter balls per 25kg filter sand Diameter: 50mmNote: Do not expose to direct sunlight!