I have had my 40-gallon up for a few years now—I have gotten through the cycle, beaten the ugly phase, and my corals are in good health—but I feel like my tank is going nowhere. My tank is just a single clownfish and bunch of random corals on the sand bed. Sure, my tank is doing well, but it has no purpose, no rhyme or reason to it. I’m thinking of maybe selling (most of) my corals and my clownfish and starting over, this time with some sort of theme to it. Should I?