Thanks. I knew I needed these I just didn't know what they were exactly called. I've been playing along at home with a Taylor YouTube video every time I do a test ba ha ha ha!The two guides you need:
Extended Test Kit Directions Archives
www.troublefreepool.com
Water Testing Errors - Further Reading
www.troublefreepool.com
You stated your TA was 80-90. On TESTING, there should be no ish. either it is 80 or it is 90. When the color stops changing, subtract that drop and that is your TA.
Ranges for TA of 60-80 is not ish. It is just a range.