Comments on: Pool calcium hardness increaser and reducer http://hardsoftwater.com/pool-calcium-hardness-increaser-reducer/ Hard and soft water provides information on water filter, softener and water purification or treatment systems Fri, 02 Dec 2016 15:04:07 +0000 hourly 1 https://wordpress.org/?v=6.9 By: Derek Watts http://hardsoftwater.com/pool-calcium-hardness-increaser-reducer/#comment-56798 Fri, 02 Dec 2016 15:04:07 +0000 http://hardsoftwater.com/?p=286#comment-56798 Sodium is definitely not a contributor to water hardness.

Calcium and magnesium account for virtually all the hardness. Maganese and iron can be ignored because their contribution in swimming pool water is insignificant.

It is essential to take into account the Langelier Saturation Index when adjusting the calcium level in the pool water.

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