The Planted Tank Forum - View Single Post - How can I add calcium without raising PH?
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post #6 of (permalink) Old 03-23-2007, 02:35 PM
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Originally Posted by mistergreen View Post
Limestone (CaCO3) lowers PH... fyi..
I guess it's the CO3 that did it..
CaCO3 increases pH to 8 9
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