.Personally I decide what the dither fish will be for cichlids based on region.
carsonrm01
tell us about your setup (tank size, stock) and we would be able to recommend a dither. Without that info, recommending anything is just shooting in the wind.
I agree with the above,
Not only because combining differing geographic areas looks a bit off to me, but combing fish from similar ecological water parameters helps in the general health of the tank.
With many Mexican and Central American Cichlids great dither swould be large enough live bearers that normally share their habitat, and live in water parameters with high mineral content..
For southern Central Americans, and South Americans from west of the Andes, tetras are some of the most common habitat sharing species.
In my current Panamanian tank Roeboides genus tetras are working well, caught in the same pH 8 and above waters
For Amazonian species the tetras that are adapted to the soft more acidic , low pH waters work well.
For southern South Americans, as suggested above, Buenos Aires tetras are great, not only because they share habitat, and water parameters like hardness, but also cooler more seasonal water temps.