Seems like there are still questions. Will try to add on to some of the good answers already here.
Dry Material
You appear to have been running the BRS Calculator calculation correctly, but you were running it for the dry product. Which in itself is not a problem.
If you were to measure out 194 grams (from your 1st screencap) of dry material, mix with enough water to dissolve it (the mix rate on the jug is fine and correct to use....more dilute is OK too), and dose all of it to the tank, your calcium number should come into line as predicted by the calculator.
In theory, you can actually do all your two part dosing using this method or measuring and mixing as you go, but it's not the usual way and makes more work out of each dose cuz of having to measure the powder and wait for it to dissolve each time.
Use the "2 Part Calcium Solution" option of the BRS Calculator if you're dosing the pre-mix (powder + RODI) you made. Which leads me to...
The Liquid Mix aka "two part solution"
"Two part" is a funny name someone came up with for three-part dosing where you manage calcium, alkalinity and magnesium with four separate, dry chemicals. Why would anyone find that confusing? :neutral: Heheh. One dry chemical each for calcium and alkalinity and two for magnesium.
Last, in your specific case, "two part" simply means the solution you create by following the mixing instructions on the jug. Once mixed with water at the correct concentration, it's generally referred to generically as "two part solution". As in: "I'm carrying around all three bottles of my two part solution."
Links!
If you haven't already, try to read up on all those links Bob posted. They are very dense and there's a lot of related material you might have to look up along the read....but highly recommended to take the time if you can.
Hope this helps!
-Matt
