Well, it's been a month and a half since I added my last fish to the DT. Currently I have two clownfish, yellow tang and a powder blue tang and a watchman/shrimp combo. A few corals (torch, duncan, zoes, etc.) I wanted to add another fish however I'm not sure what. I was thinking of another goby since the watchman/shrimp have done a great job stirring up the sand on one side of the tank (which is 120g). But what are the chances that the new goby will occupy the other side of the tank? The other fish I thought about was a royal gramma. Hmmmmm...not sure. Any others to add to my confusion?