I just set up a 5 gallon hexagonal due to the restrictions of my apartment, right now I am unable to get any bigger. When I move out I am goin to get a 30 gallon but I just wanted to get this to learn what I was doing. Anyway, any suggestions on what I could put in it. I was thinkin maybe a few tetras and a frog, but not sure. Any help would be greatly appreciated. Also, I know a 5 gal. is very small but do to my sketchy apartment they said no bigger. Thank you for your time.