Randy Holmes-Farley
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The alk should not have risen. That suggests the alk measurement is in error, either the first one or the second one, or both.
Simple aeration with indoor air will raise the pH if it really is that low, unless your air is so dangerously high in CO2 that it risks your own health.
Simple aeration with indoor air will raise the pH if it really is that low, unless your air is so dangerously high in CO2 that it risks your own health.