Total Hardness

Total hardness and calcium hardness in pool water.
Scale, calcium buildup, hard water and scaling problems.
Pool Care Proficient
Pool Care Proficient
Posts: 37
Joined: Mon 06 Jun, 2005 07:21
Location: Turkish Republic of Northern Cyprus

Total Hardness

Postby vaughanwilliams » Wed 19 Oct, 2005 12:47

I have just been given a TH kit but the scale is in "degrees Clark".
How do I convert this to PPM?


Vaughan Williams
Technical Director
Octopus Pools

Water hardness

Postby Hardness » Tue 27 Dec, 2005 08:48

To convert degrees Clark to ppm calcium carbonate multiply by 14.28

To get ppm calcium multiply by 5.71

We usually use the value for calcium carbonate in pool water balance equations.

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