I have tried 6 times and can't get the sample to turn blue. I have tried using two drops of 12 before 11 and doing the normal order but I can't seem to get a result. What I do seem to get is a pinkish precipitate at about the level I might expect a CH result, around 260 where the pool store got it about a month ago. Does anyone have any suggestions? These are my other values.
temp. 74 deg. F
I mixed between every drop and at this point can't think what I might have done wrong.