Originally Posted by MattHollingsworth
So, looking for my local water analysis online and found it.
It lists "total hardness" as 20, as measured using German Degrees of Hardness.
I then found this calculator for converting that:Cactus2000: Converter for hardness of water
And it says that I'd have 142.94 mg Ca2+/l.
Lists all sorts of other stuff as well.
Firstly, I thought maybe someone would have a use for the calculator. Secondly, I cannot quite wrap my head around this. Is this an accurate way of generating my Calcium number? The water analysis doesn't list just Calcium on it. Thoughts?
142.94 is your Calcium number. Many atoms don't exist alone, e.g., a single Ca atom. They exist as a molecule or ion of multiple atoms, e.g. Ca2+, which means 2 Calcium atoms combined to result in a postively charged ion. So, when we say Ca on here, we really mean Ca2+... and mg/L is the same as ppm.