| The Africans listed should work. If you could get some current in the tank Steatocranus Casuarius(buffalohead cichlid) are pretty cool.
If you go South American you could do quite a few species. You could do a Laetacara species, either Mikrogeophagus species( Bolivian ran or blue), Apisto's, Mesonauta Festivus, Aequidens Metae, Cleithracara Maronii (keyhole cichlid).
You could even do some of the smaller Centrals in a 50gal. Like Herotilapia Multispinosa(rainbow cichlid), Cryptoheros Sajica(T-bar cichlid), Cichlasoma Salvini (even though there max size is rather large rarely do they achieve this in a tank, probably 5-6" is more realistic), Cichlasoma Portalegrense, or a Thorichthys species.
Lots of options.
Brian |