I’m currently dosing kalk and seeing good PH results, and also using a CO2 scrubber. We caught some nice weather the other day, and my wife had the windows open, for about 2-3 hours. I experience a nice bump in PH, but I’m wondering if this short period of time with open windows can give a rise in PH for 3 days following? Before the bump, PH was holding around 8.20-8.24, and it has now dropped back to a little below that level. I’m guessing my CO2 scrubber media is exhausted at this point, but wondering if I should look into PH probe drift, any other equipment issues, or if the fresh air really causes the bump…
(red arrow is where the windows were open)
![C586E8A0-B663-47A7-B21E-4F76875950E8.jpeg C586E8A0-B663-47A7-B21E-4F76875950E8.jpeg](https://www.reef2reef.com/data/attachments/2810/2810636-065485337a749e5ddeeb24615d6e0cbc.jpg)
(red arrow is where the windows were open)
![C586E8A0-B663-47A7-B21E-4F76875950E8.jpeg C586E8A0-B663-47A7-B21E-4F76875950E8.jpeg](https://www.reef2reef.com/data/attachments/2810/2810636-065485337a749e5ddeeb24615d6e0cbc.jpg)