FILTER BALLS FOR SAND PUMP A GREAT SAND REPLACEMENT -   Filter balls for pool filtration are a must-have for everyone who owns a garden pool. They look like balls made of cotton wool, but   provide a faster filtering effect for swimming pool water . EASY TRANSPORT -   Thanks to these small balls made of PET, you can forget about heavy, problematic sand.   One 500 g package will replace 18 kg of sand . ECONOMICAL -   set of balls take it easy   enough for 3-4 years of use . also   through less resistance they cause   easier water flow as well   lower pump power consumption . WASHABLE -   the balls are reusable. All you need to do is throw the contaminated filter accessory into the washing machine. After washing, they do not lose their properties.   Thanks to filtration, the water in the pool will be crystal clear . SPECIFICATION -   material: 100% PET; efficiency: like 18 kg of sand; application: sand pumps; ball diameter: 5 cm; weight: 0.5 kg; weight in the package: 0.8 kg SPECIFICATION material: 100% PET; efficiency: like 18 kg of sand; application: sand pumps; ball diameter: 5 cm; weight: 0.5 kg; weight in the package: 0.8 kg