Don,
I'm not positive reading your post, if you are needing the Mix for the DIY Mag, or dosing instructions???
Mix: 3 Cups Magnesium Sulfate, 5 Cups Magnesium Chloride Hexahydrate... disolved in 1 gallon RO/DI.
Dosing: IF using parts A & B (Calc & Alk), after 1 gallon usage of those, you...