Aqua-Guard pH Up
You add pH up when pH is low.
Proper pH balance is an essential part of pool maintenance or skin and eye irritation could develop. Low pH causes the chlorine to become unstable, and therefore less effective in killing bacteria, algae and in the disintegration of organic matter.
The recommended range is 7.2 to 7.8 if the pH of your pool is low (below 7.2) the water will be acidic.
