Testing the pool 2-3 times a week is important for maintaining adequate water balance and sanitizer levels. It also ensures swimmer comfort.Take a sample of pool water to your SUN® dealer at least every 2-3 weeks for a complete analysis. This is your best guarantee of keeping your pool on track and preventing problems.Balance pool water to the following levels in order to prevent scaling or corrosive action — and to achieve maximum swimmer comfort.
| Test | Range |
| pH | 7.2 – 7.6 |
| Total Alkalinity | 125 – 150 parts per million (ppm) |
| Calcium Hardness: concrete pools | 200 – 275 ppm |
| Calcium Hardness: vinyl pools | 175 – 225 ppm |
| Free Chlorine Level | 1 – 3 ppm |
| Bromine Level | 1 – 3 ppm |
| Metals: Copper | 0 ppm |
| Metals: Iron | 0 ppm |
To ensure that proper calcium levels are maintained — and no metals are present in the pool water — take a sample of water to your SUN® professional dealer every 2-3 weeks for complete testing and analysis.