No pool or spa owner should ever have to experience red, burning eyes or itchy skin; unfortunately, it can happen. While it is easy to blame high chlorine levels for these conditions, the more common cause is a pH imbalance. Human skin and eyes have a pH of 7.5, so when the water’s pH deviates from this level, these types of irritations can occur. Keeping your pH between 7.4 and 7.6 will not only reduce your chances of developing skin or eye irritation, but it will help prevent scale and corrosion from building up on plumbing and other essential spa components. We recommend weekly at-home testing and monthly professional computerized testing to keep your water balanced, sanitized, safe, and ready to use!