tetrin
Aquarium Advice FINatic
also, the 5" max size is listed usually for the dominant male. adult females are 1/3 smaller than males, setting them at around 3-3.5 inches. and i'm guessing the subdominant male won't be allowed to attain full size too (or rather won't attain full size).
that leaves 12 adults at around 40 inches.
that leaves 12 adults at around 40 inches.