I gotta jump on this one, I used to breed Fronts before I swapped over to FH. There was a period of time when both type of fish co-habited in a 100g Tank. The answer is YES, they do get along pretty good, not a perfect harmony, but I can't complain. My FHs did respect my Fronts. Although from time to time, new king of the tank, FH, will pick on the Fronts, but there’s no serious injury between these two kinds. One thing to note, it was a Fronts tank 1st, then I introduced the tank with FH or FHs after. I wouldn't advise introduce a Front into a FH tank.