marwood wrote:I would like to set up a 55 gallon tank with Herichthys tamasopoensis (if I can find em) and I was wondering if I could keep Xiphophorus montezumae (Montezuma Swordtail) and Poecilia latipinna (Sailfin Molly) with H. tamasopoensis?
They are around but not many... Jeff Rapps has some.
The link to the post below is a good source for your list...
I would have one concern, the tank size. Herichthys are aggressive, yes even tamasopoensis, so I'm not sure you'd be happy with them after they get to a few inches in size. They would start to kill each other let alone the other species you mentioned (swords etc) would have no chance in a tank that size - fry and adults. I would recommend a 75 to 125 gallon tanks for a small group of 6 or less - I would also lean toward the 125 because they will grow much larger in captivity than in the wild. With the additional room you would experience a more natural behavior from the H. tamasopoensis. They would be less stressed and have lot's or room to roam and tend fry (I assume you'd like to raise some young).
Remember with it comes to Cichlids as bottom dwellers, especially the larger types, they need floor space not height in a tank.
I hope this helps. By the way I'm speaking from experience not preaching.