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Freshwater calcium, magnesium tests?


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Hi all,

I have hard water (at least 300 ppm according to the Tetra test strip).  Unfortunately I don’t know what makes up the hardness.  I checked the board of water supply’s water report but it didn’t mention either component.  I’ve found saltwater tests for calcium and magnesium but not freshwater.  Anyone know of any testing mechanism for these two components, or does it matter?

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