Well, personally I can mix a good 2 dozen into a 75g tank... I can't recommend it though... my usual advice for a first timer is to pick 3 species (as different as you can) of the medium level aggression cichlids and get 6 of each... so that puts my usual advice at 18
See why you can't get a "definitive" answer? :lol:
:thumb: good to see someone doing their research!