And that depends on how much is windows are open and how many people in the house. We are a family of 5 humans and 2 dogs. Our sliding glass door in the upstairs is open a few hours a week. The rest of the time it’s just from people going in or kut or maybe a little airing out of the house.Not me.. I have my skimmer line ran outside and it’s a very large skimmer that draws a ton of air and my ph only went up .02 at best… do you have windows or doors open on days it’s not raining and close them for the rain? I can’t see that large of a difference with just a skimmer line outside… the co2 in your home is the only thing that can make that kind of a difference.
My ph jumped from 7.8 - 7.9 to 8.0 - 8.15 with just an airline outside. Once I added a co2 scrubber to that line it went as high as 8.6 before I programmed slimy skimmer to shut off at 8.35