Definition[su_icon icon=”icon: question-circle” background=”#ffffff” color=”#19a817″ size=”72″ shape_size=”20″][/su_icon] Hardness: Hardness is typically caused by calcium and magnesium ions in water. Hardness may rarely be caused by iron, manganese, aluminum, strontium, and zinc when present at high levels. Hardness can be defined as the...
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