LSI Calculator
Langelier Saturation Index — Southern Aquatic Services
Reference factor tables
Your water test results
Saturation index equivalent factors
| pH | Temperature factor | Calcium factor | Alkalinity factor | TDS factor |
|---|---|---|---|---|
| — | — | — | — | — |
Result
Saturation index
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Evaluation
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Recommended action
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Consider
LSI = pH + temperature factor + calcium factor + alkalinity factor − TDS factor. Values from −0.31 to +0.31 are considered balanced. This is a guide — always confirm with full water testing and follow chemical label directions.