Join Date: Jan 2006
Location: Burnaby, BC, Canada
My 20 lb tank lasted 4 months. Just refilled it. It's for my 125 gallon. I am injecting via 2 diffusers. I think all the responses so far have been guess work. Only you know how much you are using. For instance, in my 20 gallon tank, I have a 10 lb that lasted 8 months, but my bubble rate is < 1 bps. In my 125 gallon I am using > 5 bps (>2 bps at each point), so obviously I am going to use a lot more gas. Do you know what your bubble rate is? If it's 1 bps and you use it up in 4 months, yeah, I'd say you have a leak. but if you are doing > 4 bps, then no, I don't think so.
Filstar pimp #59 (shhhh on the Eheim)