Saturation Index - What is it?

Saturation Index will appear in the WaterGuru App:

• If you are using a SENSE S2 C5 cassette and have entered a value for Salt
  • Note:  If you are using a SENSE S2 C5 cassette, the Saturation Index will only appear in the App if you have either entered a value for Salt either automatically from WaterGuru TEST or when manually entered using pool store test results.
  • Note:  If you are using a SENSE S2 C5 cassette, but do not have a value for Salt, you can manually enter 1000 ppm for a non-salt pool (i.e. a chlorine source of chlorinating liquid or bleach, Trichlor, Cal-Hypo, etc.) or 3500 ppm for a salt pool (i.e. a chlorine source of a saltwater chlorine generator).
• If you have entered Water Tests results manually in the app

Saturation Index indicates whether the water is properly saturated with calcium carbonate to protect plaster surfaces.

Pool plaster and most grout is composed in part of calcium carbonate.

• If pool water is under-saturated with this chemical,  then the plaster can dissolve into the water.
• If pool water is over-saturated with this chemical, then the excess can precipitate and form scale.
• The saturation index should generally be between -0.3 and + 0.3.

Note:  This information is displayed in the app Advice.  Just you tap on the Saturation Index measurement in the WaterGuru app.