Abstract: The various embodiments herein provide a poly-magnetic filter for enhancing the filtering effect on the sediment of limestone in the affected water. The filter doubles the effect of neutralizing the limestone sediment in the water molecules by simultaneously using a magnetic field and a plurality of polyphosphate crystal in a single filter. The filter is placed inside or outside a water-using domestic appliance or industrial appliance. The filter is installed at water inlet point of the appliance. The embodiments herein further provide a filtering method which primarily regulates the water molecules using the magnetic arc and further softens the water molecules using poly-phosphate crystals.