Getting a 150g tank soon and want to do a nice active tank . So would like a nice group of Geophagus nothing small , a species that get to 8" roughly ( How many??) Would have some other nice shoaling fish in there aswell like some tiger striped dollars , a group of larger tetras, would love some Fasciatus not sure how that work? It has to be active but with the Geo's as the main attraction . Ideas would be nice .