Sorry that sounds odd but I put my 25 ml of pool water in, add 20 drops of R-0010, then 5 drops of R-0011 and the sample is Fuschia pink
I start dripping in the R-0012 and after 2-3 drops its noticably turning purple
Around 10 drops its a slowly become a deep blue-ish purple, so I THINK I have a CH of 100 ppm, but I could be way off.
Is there a better test? I like a definitive titration where it goes colorless, or to an opposite color!