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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
Posts: 1,119
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
Some people say, "How can you live without knowing?" I do not know what they mean. I always live without knowing. That is easy. How you get to know is what I want to know. - Richard Feynman