The DPD No. 1 test tablets are used to measure the free (active) chlorine in pool water. Regular measurement 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 and only then the chlorine. 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: free (active) chlorine using the DPD No. 1 method
- Pack: 10 pcs
- Recommended values: Cl 0.3–0.7
