- Raises the pH of spa/hot tub water
Proper pH balance is essential part of spa/hot tub maintenance. The recommended range is 7.2 to 7.6. If the pH of your spa/hot tub is low (below 7.2), the water will be acidic. Discomfort from skin and eye irritation could develop. This condition also causes chlorine to become unstable, and therefore less effective in killing bacteria, algae and in disintegrating organic matter.