Smokin Moose
Fallen Cannabis Warrior & Ex Moderator
With a clean unit, r/o should be as close to 7.0 and 0 ppm as you can get.
There are two reasons that the pH of your Reverse-Osmosis water would not be neutral:
1) Too high-- likely a calcium buildup in the filter, machine needs cleaning or replacement filters.
2) Too low-- dissolved carbon dioxide will lower the pH. It has almost no buffering capacity, meaning one tiny drop of pH up will put it back into place.
There are two reasons that the pH of your Reverse-Osmosis water would not be neutral:
1) Too high-- likely a calcium buildup in the filter, machine needs cleaning or replacement filters.
2) Too low-- dissolved carbon dioxide will lower the pH. It has almost no buffering capacity, meaning one tiny drop of pH up will put it back into place.
