OK after listening and watching for a couple of months now I finally found the source of the "clicling" in my tank. I saw a Mantis today that looks to be about 1.5 inches. It looks dark (black) with some orange or red on it. Kind of striking looking no pun intended. Anyway I will be trying to trap him (inverted bottle method) starting tonight but need some ideas on what to do when I catch him. Please keep the suggestions humane!