Keeping your pH balanced is important to proper water chemistry. The pH of your water confers many qualities on the water which can either make it much easier to take care of, or a nightmare. High PH can cause cloudy or colored water, irritate your eyes, form scale, and cause your sanitizer to function poorly. Low pH is a leading cause of eye irritation. It can also corrode your metal equipment, shrink and weaken your liner, burn your skin, etch your plaster and encourage stains. Consider this. The pH of your mucus membranes, such as your nose, ears and eyes is 7.5 . If your pH is vastly different than that, it causes irritation. This is one of the primary reasons we try to encourage keeping your pH as close to 7.5 as possible!