The phenol red test tablets are used to measure the pH value of pool water. Regular checking is essential for keeping the water crystal clear.
First measure the water values, and if they are not within the standard (pH 6.9–7.4; Cl 0.3–0.7), adjust them with pool chemicals. Always adjust the pH first (pH+ or pH-) and only then the chlorine value. Only increase the chlorine – do not lower an excessively high value, it will drop on its own within a few days. Chlorine is applied only after adjusting the pH, because outside the recommended pH values its effectiveness drops rapidly.
Technical parameters
- Measured parameter: pH (phenol red)
- Pack: 10 pcs
- Recommended values: pH 6.9–7.4
