I've heard these fish are quite docile, yet when I put my 4" male in my community tank, he killed my 5" G. Surinamensis! Anyone have aggression like this with this species?
Run a search of Geophagus steindachneri.
Geo. hondae is an invalid synonym. If you search G. steindachneri you'll find most people don't really describe them as peaceful. Males can be quite agressive.