Hey guys and gals, I have two oscars maybe an inch long and one silver arowona that's maybe 2 inches. I'm looking to try and add one more fish. My question is are there any ciclids that aren't aggressive? I've had Africans in the past and they are just to damn mean. They are fine with oscars in my experience but never had an arowona until now and he just seems like they would destroy him. But I'm just looking for one more fish to add in to my tank and that'll be it. Anyone have any suggestions on what would be ok without having any aggressive nature once added and in the future? Thanks