Something different and anti-social (sounds like me
).
This "Blockhead" was it mislabeld "Buffalohead"?
Anyhow, the tank seems kind a small 4 foot tank (what's that like a 55 gallons? I suppose you could house a small African Lungfish (you mention mostly fish from Africa) for a while. If you tell us (J55) what kind a rocks and gravel you're going with it might make this little easier.