if you can cool but if you can,t what can you put with them,i thought you could not but fronts with them but i,ve seen i few people on here with them in it, cause they would be a cool addition to my 600 gallon front tank
The fact that one is a soft water fish from South America whereas the other is a hard water fish from Africa would prevent me from doing it (if Fronts even attracted me in any way) but if that doesn't bother you, clearly you can do it.
IMO Geophagus are more attractive and behaviorally interesting than fronts and at least they're from the same continent