Why is there no mention of Cyanuric Acid (Stabiliser) when I test my Spa?
Due to the fact that most spas are under shelter or have a cover fitted this alone protects the sanitiser from being eaten up by the UV light from the sun. Another reason is that generally the volume of a spa is less than that of a pool and Cyanuric acids levels have a tendency to reach undesirably high levels reducing the efficiency of the sanitiser.
