Is it required to have filtration on a 1000 gallon plus tank?
The tank will house a wide variety of african cichlids.

My wife and I are looking into buying a house and might be getting such a
good deal I will have quite a large sum of money on my hands, and I'm
planning that perfect fishroom for my new basement now :0)

P.S. I'll be building this tank out of poured concrete. If you have any
experiences or ideas with such a tank, please share.