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Carbonate Hardness (KH) ,Alkalinity



Hi all,
I have a question I called the the lab that checks out the tap water here in
Braĺs Sweden and I asked them about the readings of the tap water.
I found out that the
pH 8.2
dGH 1.5 (realy soft)
Alkality, HCO3 95mg/l
Now to the question !
How do I calculate the Carbonate Hardens to dKH from mg/l ???

Best regards Hans Sandén, SM7TKL , Braĺs in Sweden
hans.sanden at vaxjo_mail.telia.com