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Old 01/11/2008, 08:02 PM   #6
m2434
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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


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