OK. This is not my first tank, but my first nano tank. It's 2.5 gallon, pure white substrate, 13 watt 9000k and 15+ Marimo Balls that sink, float and dance. It looks really nice and ready for fish. I want to put a labyrinth fish in but the light substrate and water movement don't work out. What are some good fish I could use? A school of tetra? A goldfish? Some weird fish?