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Re: Source of Ca Carbonate

At 05:11 AM 8/25/2003 -0400, you wrote:
>Where do you get CA Carbonate?

Since I just ordered some this morning...
http://www.hach.com search for product number 120-01. ACS grade, $52 for
454g. Shipping would be a rather painful $11 for just this item.

Or you can just use well-scrubbed oyster shells which are free from your nearest oyster bar.