The way i do it is just buy a trio of Show quality fish, put the one male and 2 or 3 females in a ten, then when the fry are big enough to be caught, take the fry out and put them in a 5.5 gal
to grow out. You need to feed them alot and change the water every other day. Then when they get bigger take out the females @ about 4-5 weeks and put them back in the ten. Then I cull (put them in a community tank) the small tailed males and grow out the biggest ones in the 5.5 Only put the big tailed or really pretty males back in your ten and you should have a decent setup. This way you can run a line with just 3 tanks. Other way you will need 5 tanks per line, and it gets to be too much of a hastle.