If anyone uses this kit...When I do the water hardness test, the first step is to add 2 drops of the hardness solution A and mix. It says a violet color will develop if hardness is present. Mine does not turn a violet color, but it does sort of change. It's hard to say what color it is, just that it is not the color of plain water. Maybe it is a slight off-pink color? Anyway, if it is not violet, then would my hardness really be "0"? Then I assume I don't follow through with the rest of the test, where you add the B solution until it changes to blue?

The reason I'm testing is, I sometimes use Cal Hypo to shock, and I wanted to make sure my calcium level wasn't high. I do have a propane heater though, so what should my calcium level be (vinyl pool)?