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Re: "Hardness" (Alkalinity, etc..)

> From: "A. Inniss" <andrewi at u_washington.edu>
> Subject: Re: "Hardness"
> 	BTW, when using the pH/KH table, if one has high phosphates
> (from lots of fish food, not from phosphate buffers being added) in the
> tank water being tested, will such phosphate also affect the accuracy of
> the table?  And what about the sulfates from the MgSO4? Will they affect
> the accuracy?
	If by "lots of phosphates", you mean a ppm or so, the error will
be negligible.  Phosphates will interfere, but that little would not be
a problem.

	Sulphate will not interfere at all, being the anion of a strong acid.
Nitrate won't either, for the same reason.

Paul Sears        Ottawa, Canada