How close is your tank to a door or window? Any chance you could attach an airline tube to the venturi on your
skimmer and route it through a crack to the outside air? I know that you are in IN and understand the weather (I lived in NE OH for 26 years) but I have found that if I just loosen the top pane of the window from the seal in the room where my aquariums are that prevents the CO2 buildup and my
pH stays at 8.3.
