I have a 75 gallon freshwater tank thats up and running with a fx4. The water is all cylcled and ready for fish. currently i dont have any substrate in the tank but I could always add that. Im just not sure what to put in the tank. Im open to anything but im into odballs or cichlids. Any suggestions? It could be something that would grow out of the tank because my Lfs will take it when it grows out of my tank for an exchange.