Toedter says the ideal range for hot tub water pH and TA is 7.4 to 7.6 and 80 to 120 ppm, respectively, although this may vary slightly based on whether you use chlorine or bromine as a sanitizer.

In the widely viewed clip, he responds to a woman's experience of developing a rash after using a hot tub at her Airbnb ... efforts with chlorine and bromine, the responsible bacteria are found ...