I just put a 10 inch black aro in my 125. As of now he is in there with a spotted gar. i was wondering what you guys put in w/ your aros. i am wanting to add some south american cichlids (not sure if the aggression levels will be too high) here is what i am wondering if will work. some choices - jack dempsey, texas cichlid, oscar, managuense, red tiger motaguense, green or red terror, flowerhorn. these are just some ideas. i was even thinking about a couple of fronts. and yes i am upgrading w/ in the year. thanks for the replies.