If you know ahead of time that you are going to target deep water fish, you might want to make a release cage. The best cure for an inflated bladder is to quickly return the fish to the aprox. depth it came from. Something like an inverted milk crate so that the open top is on the bottom. Use balenced weights to help it sink faster and evenly. There are other variations. I am sure there are some google pics or you tube vids on this.