They were mine (I moved recently and had to give all away).Are those your fish? I just want the ones with the most colour and active. Tank mates can wait till I fine the sort of geos I want
They 2nd and 4th shots are Acaraichthys heckelli, a warm water species from northern SouthAmerica, any reasonably sized tetras, or S American cichlids would be decent tank mates.
The 1st, and 3rd shots are Gymnogeophagus gymnogenys "yerbalito", and Gymnogeophagus gymnogenys "sp Paso Pache", both from Uruguay, and require a cool down, and really don't need a heater at all. Buenos Aires tetras, Uruguayan corys and other Uruguayan cichlids would make good tank mates, or if you did't care about being geographically correct, white clouds, or high altitude Mexican live bearers could work.
I've kept Xenatoca eiseni with the Gymno species such as balzani without problems.