In search of cheap calcium

mox

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Mar 18, 2003
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I want to add calcium powder to some pet food I'm making, but I don't want to pay through the nose for it. It is one of the most common elements on earth and there seems like there would be a cheap/safe source of it, I just can't find it. Does anyone have any suggestions or a vender?

Edit: It can't contain salt because I am wanting to feed the mixture to snails. I'm going to check out Lowes later today to see if I can find anything suitable, but I have my doubts about it.
 
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