I have 8 foai and 16 cyps in my 180.
I might have bought a few more cyps but that is all the seller had.
16 was not too many. I'd like 25.
Turns out for me, I have way more males but it is not a problem. Mine were juveniles at the time so I did not know gender.
IF you are buying adults and want to breed them, try for 50-50.
If you don't care about fry you could go heavier on the males. They color up nice and don't injure each other in a big tank.
PS - I don't know about the 4 N. buescheri and 2 N. calvus. I am breeding my two groups and don't want other fish in there.
I might have bought a few more cyps but that is all the seller had.
16 was not too many. I'd like 25.
Turns out for me, I have way more males but it is not a problem. Mine were juveniles at the time so I did not know gender.
IF you are buying adults and want to breed them, try for 50-50.
If you don't care about fry you could go heavier on the males. They color up nice and don't injure each other in a big tank.
PS - I don't know about the 4 N. buescheri and 2 N. calvus. I am breeding my two groups and don't want other fish in there.