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Re: And add dash of ...

In a message dated 1/19/99 1:56:26 PM Mountain Standard Time, Aquatic-Plants-
Owner at actwin_com writes:

> Luca mentioned that you can determine the amount of magnesium by
>  subtracting the amount of calcium from the GH.  I have never seen a test
>  kit specifically for calcium.  Who makes them?

The Wardley's Total Hardness test kit includes two tests.  One is total
hardness, the other is calcium.  The explanation about figuring magnesium is
included in the instructions.

Bob Dixon