First of all, please forgive my ignorance, but I don't have my test kit handy where I can read the exact reagents.
I'm starting the shocking process on my pool today to open it for the season. I did my first round of tests for the season using my TF test kit. The instructions for the CH test indicate you add 20 drops of solution a, then 5 drops of solution b. The water should change to red, and add solution c until it turns blue. Well, after I added the 5 drops of solution b, my water stayed clear. I tried adding solution c just to see if the water would ever turn blue, but I could not tell a difference. Am I doing something wrong, should I be concerned?