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Re: Calcium source
> From: Stephen Pushak <teban at powersonic_bc.ca>
> Subject: Calcium source
> what is a good chemical source of calcium that won't increase carbonate
> hardness? CaCl? Will it affect pH?
CaCl2 will work, and will not affect the pH. You will end
up with pretty high Cl- concentrations, 12.6 ppm for each degree
of GH. I don't know if that would be a problem.
> do humic acids interfere with measurements of carbonate hardness? would
> it cause a positive or negative error in measurement?
Any weak acid anion will cause a false high reading.
Paul Sears Ottawa, Canada