Sorry H2OEGR, but adding Ca does not do a thing for increasing alkalinity. Most Ca increasing solutions are CaCl, and Cl ion does nothing for alkalinity.
Alkalinity is a measure of your buffering capacity. Buffering stabilizes pH. More alkalinity, more stable pH. Less alkalinity, wider pH fluctuations.
Dad, I too hope you are doing the test right. If you are putting 240ul of the Calcium test solution in the test tube and it turns blue, then you do indeed have Ca =130 parts per million.
If you are putting more than half the volume of the syringe, or 760ul into the test tube before it turns blue, then your Ca is 370parts per million, and you are perhaps a little low, but probably OK for Calcium.
Just to check, you use 3 ml tank water, 6 drops Ca-1, one scoop of the purple crystals, and then drip in the Ca-3 from the syringe, right?
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