Pond filter box for the pump systems napoli and sienathe filter box can be used together with the solar pond pump sets napoli and sienawhen the pump runs the water flows from above through the individual sponges or nets with stones to the pump the filtered pond water is then returned to the pond through the sprinklerdelivery without a pumptechnical data consisting of a pond filter box with handle and cover 3 filter sponges and 2 net bags without filter material dimensions l x w x h