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  2. How to remove hard water deposits from your faucets and ... - AOL

    www.aol.com/remove-hard-water-deposits-faucets...

    Calcium and magnesium are the main culprits when it comes to creating hard water. And in the U.S., it's almost impossible to avoid it, as hard water is present across 85 percent of the country ...

  3. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    It shows sodium ions being released by the resin, and replaced with calcium ions captured from water. Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions.

  4. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    A bathtub faucet with built-up calcification from hard water in Southern Arizona. Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [1] which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.

  5. Limescale - Wikipedia

    en.wikipedia.org/wiki/Limescale

    Limescale is a hard, chalky deposit, consisting mainly of calcium carbonate (CaCO 3). It often builds up inside kettles, boilers, and pipework, especially that for hot water. It is also often found as a similar deposit on the inner surfaces of old pipes and other surfaces where hard water has flowed.

  6. This Common Water Problem Might Be Making Your Home Dirtier - AOL

    www.aol.com/lifestyle/common-water-problem-might...

    Water hardness is measured by the milligrams of calcium carbonate per liter of water(mg/L). Soft water: 0-60 mg/L. Moderately hard water: 61-120 mg/L. Hard water: 121-180 mg/L. Very hard water ...

  7. Lime softening - Wikipedia

    en.wikipedia.org/wiki/Lime_softening

    Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.