The airstone, overnight, did not improve the pH with indoor air. The pump is now sitting in an open window so pulling outdoor air into the tank, and no change yet. Would this be a quick change, or a slow one? I had left the window open for 24 hrs a few days ago and saw no change, even with a fan sitting in front of it and blowing into the openings on my biocube.
It takes a few hours (6+) for my skimmer to make the change if I turn it off...