My pH is 8.6 out of my tap. I have to use the high pH test to get an accurate reading on it. By filling a 5 gallon bucket and putting in an airstone in overnight, the pH drops down to about 7.6 after 12-14 hours. As I don't have CO2 in my tank, I use pH down to get it down to 7.0 or so. Not everyone would use that method, but it works for me and I haven't seen any adverse effects from it.
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