pH
Maintaining a proper pH range – the perfect balance between acidity and alkalinity – is essential for sanitizers to effectively kill harmful bacteria. Proper pH also prevents staining and corrosion of spa equipment, skin and eye irritation, cloudy water and scale.
The ideal level is between 7.2 and 7.6 ppm.
Total Hardness
This aspect measures the amount of calcium and other minerals in your water. Having water either too hard or too soft, combined with other balance factors, can damage spa equipment and surfaces.
The ideal level is between 175—275 ppm.
Total Alkalinity
Total Alkalinity and pH are closely related. A low total alkalinity may cause fluctuations in your water’s pH and exacerbate low pH. Having highly alkaline water can cause pH to drift upwards.
The ideal level is between 80—150 ppm.
