It's a Killifish..................not a Cichlid
Found this, although i think you've already discovered it's not a community fish:
'This is a robust killi that can be kept with others, but is not a fish for the general community. Species that inhabit different levels of the tank than the killis make the best tankmates, such as Corydoras catfish, peaceful dwarf cichlids or Loricariids. Male F. g. gardneri are very aggressive towards one another and sufficient space must be provided if more than one is to be kept. Females should be kept in small groups of 2 or 3 per male as they may be harassed quite vigorously by the males'.