Thanks Thom, and Thanks Hypancistrus,
My Calcium Chloride is the stuff Gregg Watson sells. My well water is fairly near zero GH and KH according to AP tests. Not sure wether to do 4:1 or 3:1 ratio.

Maybe I'll split the difference. I see some white residue on the top of the change tank, so there is probably some calcium in the water, just not much. But like you said, there is a margin for error. And my tanks always experience some large margins of error thanks to me, from time to time.
Any recomendations on preferred calcium tests? Thanks again. bob
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Three Tanks...Eheim 2128 & XP3-90G, Eheim 2128-65G, Eheim 2232-25G.... Tek 4x54 watt T5-90G, Aqualight 96watt PC 65G low tech, 65 watt Aqualight-25G.... Hydors-90G & 65G ... Flourite in 90, 65, & 25 Gallons, .... Auto Water Change/Auto dosing on 90 & 65 gallon..... AGA member......