If your pH is truly that low, then your home must be full of co2 and I would not expect the media to last more than a few days or a week.
What does the pH go up to if you open all of the windows and let the wind blow through your home for a few hours and exchange 100% of the air? If not 8.2 to 8.3, then your probe is probably bad or mis calibrated.
Even in a 100% tight house with newborns where I could not open the windows at all, I ranged from 7.75 to 8.0, or so.