Adding one more data point, I already had everything I needed to setup a 9pz & it lasted me one day.
Now, I didn't have a bubble counter (yet) but was able to stabilize on a one ph drop which lasted 12hours. My tank is 180 gallon.
I'm trying to figure out if I need to go buy a new reg & 5lbs tank... Or if I should just fill my 20oz (again same reg as the 9oz) & go.
My research says if 9oz lasts one day then 5 lbs should last me 71 days or 2.5 months. But some of you are getting a whole lot more out of your 5lbs tanks?
Justin