I recently invested in a 12gal Nano Cube DX, and I'm too the point where I need to begin thinking of fish. I'm thinking of getting 2-3 <I>small</I> gobies, and a swimmer of some kind. I've got the gobies picked out, but I don't know what to get that will actually swim in the water collum that would comfortably fit. What should I get? I want something colorful, and something that not everyone has. Trying to go a bit different with this tank!