This is one the many reasons why people should contact their water company and request for a COMPREHENSIVE water report. It will detail the exact concentrations of Ca and Mg, among a host of other variables. The report is free.Edward said:Usually people think if there is GH there must be Ca. Wrong. There may not be any Ca or any Mg and still get nice dGH readings.
I wish more people would participate in IUnknown's post so the "lazy" among us would have even less incentive to lift a finger. :|