So I've been having parties where I get a keg or 2 and run them through my jockey box at about 45 psi (which keeps it from foaming up). I did so on a full tank last night and when I looked at it this morning the gauge said the tank was empty. I turned the tank off after the last keg was killed. Is it that it just uses this much co2 in a night or do I have something wrong? 20lb tank