User Guide

Page 19
Section 6.4 Calculating Saturation Index
Test the water for pH, Alkalinity, Calcium Hardness, and Temperature, then follow the simple steps
below:
1. Write your pools pH level here: pH ________
2. Find your Alkalinity level in the chart below, and write the corresponding Alkalinity Factor
here: Alkalinity Factor ________
3. Find your Calcium level in the chart below, and write the corresponding Calcium Factor here:
Calcium Factor ________
Pool Calcium 5 25 50 75 100 150 200 300 400
Factor 0.3 1 1.3 1.5 1.6 1.8 1.9 2.1 2.2
4. Find your pool temperature in the chart below, and write the corresponding Temperature
Factor here: Temperature Factor ________
Pool Temp 32 37 46 53 60 66 76 84 94 105
Factor 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Pool Alkalinity 5 25 50 75 100 150 200 300 400
Factor 0.7 1.4 1.7 1.9 2.0 2.2 2.3 2.5 2.6
5. Add the results from steps 1 through 4 above and write the result here: Total Above ________
____-12.2
6. Subtract 12.2 from step 5 and write the result here: Saturation Index = ________
NOTE
• If the Saturation Index above is between –0.3 and +0.3, the water is well balanced.
• If the Index is more than 0.3, the water will tend to cause scaling or get cloudy. Alkalinity and pH
should be reduced accordingly, but maintained within recommended levels.
• If the Index is less than -0.3, the water will tend to be aggressive toward the pool surface, equipment,
and bathers. Alkalinity and pH should be increased accordingly, but maintained within recommended
levels.