i'm aware. i'm curious how often others are refilling their tanks to get an idea of what others are using. recently i have had to refill my 20lb tank a lot more often. i can find no leak on the regulator but consumption is about half what it was previously. from about 6 months to about 3 months
I came across this thread wondering the same thing, I'm at 12 months with my 5lb bottle and is probably only about 1/2 to 3/4 gone. My tank is around 150 gallons total volume with over 22 acros, so alk and Ca consumption is pretty high. I thought I was only suppose to get 6-8 months out of a 5lb bottle.