I gotta second/third/fourth the bichir idea.
I own 10 myself, and they are currently residing in a 10g, 20g, soon to be 55g and a 180g.
With a 210 (what are the exact dimensions?), you can stock it nicely with a community of polypterus endlicheri endlicheri and polypterus lapradei. They are two of the largest (the largest being P. endlicheri congicus, but its not as nice looking as P. endi endi) maxing out at around 3 feet (very rare in captivity and it takes a darn long time). They are still pretty expensive though (relative to your run of the mill tetras)
If you want to go for an african theme you throw in a few synodontis for clean up and a school of large congo tetras
I own 10 myself, and they are currently residing in a 10g, 20g, soon to be 55g and a 180g.
With a 210 (what are the exact dimensions?), you can stock it nicely with a community of polypterus endlicheri endlicheri and polypterus lapradei. They are two of the largest (the largest being P. endlicheri congicus, but its not as nice looking as P. endi endi) maxing out at around 3 feet (very rare in captivity and it takes a darn long time). They are still pretty expensive though (relative to your run of the mill tetras)
If you want to go for an african theme you throw in a few synodontis for clean up and a school of large congo tetras