I've got a 4 footer set up what I've had for the past couple of years. I kind of regret doing it. My first two fish what are still alive (3 years old) are an Angel Fish and a red fin albino shark. I have had a lot of fish and my favorites would be the Spot finned spiny eel, I hand feel it garden worms and the red fin albino shark, they have a funny aggressive personality he is the king of the tank nobody messes with him
same as that but mine has dark red fins.
Heres what my eel looks like
Heres what my eel looks like