Pool School 101 - The Langelier Saturation Index

 

The best thing you can do for your pool is to make sure it is well balanced. Test your water and fill in the necessary measurements for your pool or spa water.

If the result is between -0.5 and 0.5 the water is balanced.

If it is below -0.5 or over 0.5 your water is either over or uder saturated, which can lead to problems. Add the necessary adjustment products to bring your pH, Total Alkalinity (TA), and Calcium Hardness (CF) within the proper standards, then retest.

Ideal readings for proper water balance:
- pH 7.2 to 7.6
- Total Alkalinity 80 to 125 ppm (parts per million)
- Calcium Hardness 200 to 400 ppm (parts per million)

In the next sections, we will discuss each individual components of water balance in detail. Click here for a printable copy of the Langelier Saturation Index table.

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