I recently bought the TF100 test kit and have been having trouble with the CH test. When I test it, my sample never turns from red to blue even after going as high as 50 drops of R-0012. At first I though that my calcium levels were through the roof but then I took a sample to Leslie's and it was reading ~400ppm. So then I thought that maybe the test kit chems were contaminated but when I tested our tap water they seemed to be at normal levels for Arizona water (~300ppm).
My water analysis report from Leslie's read as follows:
FC: 7.5 ppm
TAC: 7.5 ppm
salt: 3600 ppm
CH: 400 ppm
CYA: 90 ppm
TA: 120 ppm
phosphates: 200 ppb
I know some of these are a little on the high side but can any of them cause an issue with getting a proper reading with the CH test?
Also to note, I recently converted to a salt pool a few weeks ago if that may have something to do with it.