A water filter removes impurities from water by means of a fine physical barrier, a chemical process or a biological process. Filters cleanse water to various extents for irrigation, drinking water, aquariums, and swimming pools.
Read more about Water Filter: History of Drinking Water Filtration, Methods of Filtration, Water Polishing
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“Iron which is not whetted will grow rusty; water which does not flow will become stagnant.”
—Chinese proverb.