Method of use:

• Dip test strip into solution, in direction of arrow, for roughly three seconds, so that all colour zones are immersed.

• Compare indicator zone (unprinted area) to colour scale and read off printed pH value (by holding strip against light, if necessary).

For reference:

pH less than 2 = strongly acidic (the pH of Pepsi-Cola or Ribena is 2.6!)

Distilled water has a pH of 7
(tap water varies between ca. 6.8 and 7.2 and is generally slightly alkaline in hard water areas)

pH greater than 12 = strongly alkaline

Before discharging descaling solution to waste,ensure that pH value is at least 5, using NEUTRALISING CRYSTALS to increase the pH value if necessary.