What Is Total Alkalinity in Pool & Spa Water?
Total alkalinity measures the water's buffering capacity. In practical terms, it helps resist sudden pH swings. When alkalinity is far outside the recommended range, pH can become difficult to manage.
Test total alkalinity along with pH and sanitizer. Correct it according to the recommendations for your specific pool or spa rather than treating the numbers independently.
Once alkalinity is in a suitable range, fine-tuning pH is generally easier and more predictable.
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