Interpreting the Result
Index
Below 9.6
9.6 - 10.5
10.6 - 10.9
11.0 - 11.2
11.3 - 11.6
11.7 - 12.6
Above 12.6
*NB: If scale forms or corrosion is apparent seek expert advice,
even if an ideal balance is indicated.
Water Balance
Condition
Highly Corrosive
Corrosive
Acceptable
Balance
Ideal Balance
Acceptable
Balance
Scale Forming
Highly Scale
Forming
Recommendations
Increase pH to 7.5 - 7.8.
Increase Calcium Hardness
to at least 50 mg/l.
Increase Total Alkalinity to 100
mg/l or higher as necessary.
Retest Water Balance.
Retest water regularly.
No action required. *
Retest water regularly.
Decrease pH to 7.2 - 7.5.
Decrease Total Alkalinity to 150
mg/l or lower as necessary.
Retest Water Balance.
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