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Re: [APD] Calcium Carbonate question
I believe Vaughn Hopkins wrote this email section below:
> Calcium carbonate will only raise the GH if it dissolves in the
> water. (Isn't that profound?) So, if you dump in a tsp of it and it
> just settles in the substrate to dissolve very slowly as it tends to
> do, the GH wont change at all.
I suspect that is the reason.
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