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Hard water.

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  • معلومة اضافية
    • نبذة مختصرة :
      Hard water is water that contains a higher-than-normal amount of dissolved minerals per gallon. The two main minerals associated with water hardness are calcium and magnesium, but other minerals can also cause hard water. The hardness of water varies from place to place and depends on the minerals present in the ground where the water originates. Water that contains very few of these minerals is considered soft water.