I haven't bought the fish yet-I have an empty 55 and I want to sell it fot a 75. I was thinking about that issue, and I decided that, if I decided on a non-cichlid tankmate, I would put it in the tank before the GT. That way, the GT would be more likely to accept the tankmate, and that's why I'm planning to get a bichir or Chaca catfish or something-they're interesting fish, and if I'm not mistaken, they're quieter and less likely to be noticed and beaten up by the GT than, say, a Pictus cat or something more active and colorful. Does that make sense?