The alkalinity test measures all of the alkaline or base materials
in the water. Total Alkalinity acts as a buffer to stabilize the pH.
THE ALKALINITY FOR A SPA IS BETWEEN 80ppm and 120ppm. If the
alkalinity is too low, the water has very little buffering capacity
and the pH will become erratic. A high alkalinity means that the
water has too much buffering capacity and the pH will be very
difficult to change. For this reason it is best to adjust the
alkalinity first. You can use SPA UP to raise the alkalinity and SPA
DOWN to lower it.
