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Old 01/11/2008, 10:02 PM
m2434 m2434 is offline
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Join Date: Jan 2004
Location: Boston, Ma
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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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