From
6990
pH/Chlorine Testing Kit
Tester and tablets that easily measure the pH value and chlorine level in pools or hot tubs. The pH value must be 7-7.4 and the chlorine level must be 0.6-1.0 mg/l in a pool or 1-1.5 mg/l in a hot tub. One tablet (Phenol Red) is placed in the left water-filled chamber to measure the pH value, and another tablet (DPD1) is placed in the right-hand chamber to measure chlorine. The tablets dissolve and colour the water. Compare the colour of the water to the colour scale next to the chamber to determine the pH value and chlorine level.
