7-Stage Water Purifier First Stage (Cotton Filter): Composed of a cotton candle made of polypropylene material that filters up to 5 microns and works to remove solid impurities such as sand, mud, and algae. Second Stage (Granular Carbon Filter): Made of thermally activated carbon, its function is to remove dissolved gases and treat water from undesirable substances such as chlorine, taste, odor, and color. Third Stage (Solid Carbon Filter): Made of solid carbon with 1-micron pores, its function is to remove the smallest impurities before water enters the fourth stage. Fourth Stage (Salt Filter): This is a unit known as the membrane. It contains extremely fine and narrow pores up to 0.0001 microns and relies on the property of reverse osmosis to remove salts, bacteria, and heavy metals. It starts at a 96% rejection rate, known as mechanical rejection, which does not use any chemicals. Fifth Stage (Post-Carbon Filter): A carbon filter made from coconut shells that works to remove any unpleasant odor or taste after the water is stored in the tank. Sixth Stage (Minerals): A collection of volcanic rocks containing a calcite unit that supplies the water with the minerals the body needs. Seventh Stage (Alkaline Filter): Raising alkalinity (pH): Balances the water's acidity and converts it into healthy alkaline water. Adding natural minerals: Supplies the water with essential minerals beneficial to the body such as calcium, magnesium, and potassium.