Waterpik Technologies Electronic Chlorine Generator Saturation index, Si = pH + Ti + Ci + Ai

Saturation index

The saturation index (Si) relates to the calcium and alkalinity in the water and is an indicator of the pool water "balance". Your water is properly balanced if the Si is 0 ±.2. If the Si is below -0.2, the water is corrosive and plaster pool walls will be dissolved into the water. If the Si is above +0.2, scaling and staining will occur. Use the chart below to determine the saturation index.

Si = pH + Ti + Ci + Ai - 12.1

∫C

12

16

19

24

29

34

39

∫F

53

60

66

76

84

94

103

Ti

.3

.4

.5

.6

.7

.8

.9

Calcuim

Hardness

75

100

125

150

200

250

300

400

600

800

Ci

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.4

2.5

Total

Alkalinity

75

100

125

150

200

250

300

400

600

800

Ai

1.9

2.0

2.1

2.2

2.3

2.4

2.5

2.6

2.8

2.9

How to use: Measure pool pH, temperature, calcium hardness, and total alkalinity. Use the chart above to determine Ti, Ci,and Ai from your measurements. Insert values of pH, Ti, Ci and Ai into the above equation. If Si equals .2 or more, scaling and staining may occur. If Si equals -.2 or less corrosion or irritation may occur.

-.2 0 .2

CORROSIVE SCALING

OK

2