Good ol' GBS. I've had one in my tank for a little while now and probably couldn't live without it. They are great scavengers and will make a great addition to your clean-up crew. Slow movers, such as snails or small conchs can be easy prey for these guys. You should spot feed the GBS a least once a week. If he knows a free meal is coming he may be less apt to take a chance on a small, slow moving fish or shrimp. Hes been fine with my cleaners. They try and steal food from him and dance on top of him during feeding time. He seems a little irratated by this but the shrimp are too quick for him. I spot feed mine
freeze dried krill 2-3 times a week. They do get big and grow pretty fast.
HTH