ExcelPool Products Excelpool Salt System Installation And Operation Manual page 7

IDEAL CHEMICAL LEVELS
Salt
Free chlorine
pH
Cyanuric Acid
(Stabilizer)
Total Alkalinity
Calcium Hardness
Metals
Saturation Index
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
3200 to 4000 ppm
1.0 to 3.0 ppm
7.2 to 7.6
50 to 100 ppm
80 to 120 ppm
200 to 400 ppm
0 ppm
-.2 to .2 (0 best)
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