Tip: Levels which are too low require the addition of a Hardness Raiser or
Calcium Chloride. Recommended range for calcium hardness is 180250ppm.
If too high a product that suspends the calcium in water will be needed.
Calcium Hardness levels will be tested when you take your pool water to
your Pool Professional.
Water Hardness
CaCO3 equivalent
Classification
(mg/L)
Soft
<75
Moderately hard
75–150
Hard
150–300
Very hard
>300
< Means less than and > Means more than
I hope that wasn't too difficult to understand.
Now you know that water balance is about pH, Total Alkalinity and
Water Hardness.
REMEMBER - IT'S ALL ABOUT BALANCE!
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