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Saturation Index Calculator
Instructions:
This calculator generates the Langelier Saturation Index (LSI) for a pool or spa.
The LSI assesses the overall balance of the water.
- In the appropriate box below, enter the temperature in degrees Fahrenheit. Be sure to use the temperature at which you regularly maintain the pool or hot tub.
- Use your AquaChek test strips to measure the pH, alkalinity, cyanuric acid (if any is present), total hardness and total dissolved solids (TDS).
- Click on the “Calculate Saturation Index” button to determine whether your water is corrosive, balanced or scale-forming. Note: you must enter all parameters to calculate this index correctly.
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