Use: Cut off the voltage to the pump to block the flow of water from the pool. Open the filter container as indicated in the product manual. Remove the previous filter material. Fill the filter container to the brim with new filter balls. Distribute the balls evenly without pressing them together. Reassemble and start the pump. Consumption 1 bag/filter change. It is recommended to replace the filter material 1-2 times/year. The filter balls are easily disposed of as normal household waste after use. ATTENTION! flocculants should not be used with filter systems using Filterballs