If the pH is too low (acidic) metallic wetted components can corrode. If the pH is too high (basic) scale will build on the wetted spa components. If the pH is not maintained between 7.2 – 7.6 the sanitizer will become less effective. The more chemicals added the greater the change in pH.
Every time bromine or dichlor is added to the hot tub water balancing hot tub pH must be done. If you are relying on typical sanitizers such as bromine or dichlor to perform the primary sanitization of your hot tub you know that balancing hot tub pH water is a chore.
