pH Plus is a critical part of your pool water maintenance program. The key to balanced pool water chemistry is the pH level. When the pH level is too low, it can lead to corrosion of metallic pipes, rapid loss of chlorine and skin irritation. The proper pH range is 7.2 – 7.8. This range will allow your sanitizer to work more efficiently, reduce equipment corrosion, reduce eye irritation and reduce skin dryness.