| You could leave the pair of Aequidens Pulcher in the 55gal.
You can add to it Herotilapia Multispinosa, Rainbow cichlid, in the 55gal also. Although Herotilapia Multispinosa is a Central American cichlid it stays small, I know some who have had them and they never got past about 3.5", they are a very mild mannered Central. Once they grow a bit they do have some cool colors also.
If you can find Laetacara Thayeri where you live you could also do them as well. That is one of the Laetacara that I don't see come around too often. In the same species you could also go with Laetacara Curviceps or Laetacara Dorsigera both widely avaliable.
Microgeophagus Altispinosa, Bolivian Ram, would also work. However with these since you already have an established pair of Aequidens Pulcher in the tank I would try to look for bigger fish if you decided to get them, say in the 2-3" range. I actually like these more than Microgeophagus Ramirezi, if you take the time to grow out the Bolivians they are a great looking fish.
You could also add a BN if you want, but I would stay away from the Heros Severus.Unless they are all you want in the 55gal I wouldn't do it, and some will say a 55gal is too small for them to begin with, once they hit 10" there isn't much more room for anything else in that tank.
So I think you could pick any one pair of the fish listed and you should be fine in the 55gal along with what is there already.
Brian |