Aquapool pH Indicator Solution

1 – Immerse the comparator cell and collect a water sample from approximately 30 cm deep, leaving the water at the level indicated on the cell; 2 – Add 5 drops of the Phenol Red indicator (red cap tube) to the cell tube corresponding to the pH; 3 – Place the lid on the cell and gently shake to homogenize the solution; 4 – Compare the color of the solution obtained with the corresponding color standard scale in the cell, thus determining the concentration values (in ppm) of pH.