they are cool fish. kept em for years.
had em in a 6 gallon eclipse for a good five years or so. the tank was beyond overstocked and i would always sell of the biggest ones as they grew. after they finally died out after i upgraded to a 20 gallon (huge infection, everything died), they were essentially a dwarfed variety, and the males only grew to be an inch or so long. all kinds of different colors though.
so since you also keep nanos, try selecting for the smallest adults. eventually youll get a strain that produces small fish that you can keep more of, and are more to-scale with the tank.
just a thought.
Eheim Pimp #296
Canon Pimp #67