The strongest quality cartridge filter system, model 634T, for all Dakota Fields pools with a circulation capacity of 7,192 l/h or a pump capacity of 9,463 l/h, the connection is 230 V/360 W. The matching filter medium for your cartridge filter Optimo 634T is the Dakota Fields filter cartridge type B. All Dakota Fields pools can be connected with a hose connection diameter 38 mm / 2 inch external thread. 2 swimming pool hoses with a length of 1.50 m, diameter 38 mm / 2 inch male thread for Dakota Fields pools are included (delivery without connection fittings). The Dakota Fields water revival technology improves the circulation, filtration and water clarity of your pool, as well as air quality. The filter system can be used up to a maximum water temperature of 35 C and is suitable for salt water up to a salt content of 3 g/l. Increased number of negative ions on the surface of the water. Increase the negative ions on the surface of the water. Negative ions have proven to improve the air quality around the pool.