Thanks NittyGritty. I'm dosing esv b-ionic 2 part solution for alk and calcium and kent's for magnesium. I use a BM T-01 3 part dosing pump. My parameters are: Alk- Low 9, Ca- 420, and mag-1350-1380. BRS 2 part solution is a little cheaper but I hear ESV is always consistent and pharm grade in their measurements.