yea it definitely was pulling a lot of air through the durso. I didn't realize just how much was getting pulled through and never put the two together. The PH has been stable still now overnight with the windows closed and dips down to about 7.9 the lowest. I think that's a decent amount for the night considering I don't run a fuge on the tank. You'll definitely see a difference in PH when you throw your skimmer line outside. Another thing I did was I hooked up a spare BRS reactor that I had inline and have it full of carbon to filter out the high quality air we have here in NYC lol. I'll post updates occasionally as well. Might just dip my feet back into SPS again.