[Filter Ball] 500g instead of 18kg filter sand instead of filter sand and glass filter cup, lighter weight, higher efficiency and reduced backwashing time. [Material Specifications] The material is 100% polyethylene, lightweight material.The filter ball looks like a cotton ball, is very soft and fluffy, permeable and has a long service life.Diameter Φ50mm. [Environmental protection] The filter ball has a high dust holding capacity, so it is very durable.The filter ball can be cleaned and reused.Energy saving and environmental protection.It can be cleaned by machine or manually.Clean regularly, the filtering effect is better. [Super cleaning power] The filter ball has high dust collection capacity.Even the finest dirt particles of 1 micron can be filtered, and grease in water can also be filtered without agglomeration. [WIDE RANGE OF USES] As a swimming pool cleaner, suitable for all sand filter systems.Whether it is a garden swimming pool or aquarium, filter pumps, fish tanks, filter buckets, etc., they can effectively filter suspended solids and improve the quality of the water.water, bringing you clean and clear water!