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Old 01/11/2008, 08:02 PM   #6
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Join Date: Jan 2004
Posts: 2,171
The only other thing I can think of is if your pH drops low, some rock and sand could dissolve. The pH would have to drop below 7.8 however and it's not likely with a dKh of 11.8, but possible if your home has very high CO2.

Of course, if the LFS tested for you, they could have the same “bad” test kit as you

Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there. ~Richard Feynman
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