when I 1st got my 150 last yr I did a setup like this.
African:1 front, 1 male peacock, kenyi pr (bred nicely), borelyi(sp?)
American: grammode, pike, texas, gt, red tiger, black belt
it was so cool and no probs til my BB got a lil psycho as usual but only went after the gt. Fed em all Brine Shrimp, Emerald Entre, ghost shrimp, pellets and flakes. no one died til the storm (damn you katrina).