Hi This is my first pool. Two days ago filled it with water. Yesterday took tests with 6 way tester and added bleach and baking soda as per the math calculator. Then today I tested again before adding anything more. But so far, both times I tested, the calcium hardness test came out 0. The water never turned red with the first droplets of testing. Thinking that this is an error, I tested my tap water at the kitchen sink and it definately has calcium hardness. My pool water is only 55 degrees and I wonder if this has something to do with it? All other numbers are not too far out of range...todays test results are FC 5, PH 7.8, TA 80, CYA 0.