Join Date: Jul 2013
Location: Gainesville, FL
The high pH is for 7.4-8.8, regular for 6.0-7.6
So there's some overlap which makes it a bit confusing if you happen to fall in that area. For example, I recently tested my tap and using the regular it seemed to be the blue color that signals 7.6 but on the high test the color was odd and not quite even between the 7.4 and 7.8 colors...
Either way, still gives a good enough ballpark in my opinion.