[APD] Help with Ca and Mg calculations

["Daniel Larsson" <defdac at hotmail_com>]

Hello folks!

I have a problem. I want to know Ca in ppm, but only knows these
values:

Total hardness: 3,6 dH 
Alkalinity, HCO3: 55 mg/l
Mg: 2.3 mg/l
Na: 19 mg/l
Cl: 11 mg/l
F: 0,13 mg/l
Conductivity: 18,2 mS/m

Is it possible to derive Ca-content from these values? If so, I would
love to know the Ca-content in ppm 8)


// Daniel.
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