Find an appropriate hole in a huge piece of LR in the tank. Take the Frog out of the tank, dry it, throw a glob of glue where it will contact the rock, give it ten seconds to start setting up, and then quickly jam it into your hole. The glue should cure real quick, but if you are fast, you will get it before it cures. If you don't, just try again. You can do this without taking the rock out. Good luck