20 long or 29 gallon tanks, if you can find it, lightweight gravel made from lava rock, sponge filters suspended in tank or buried under gravel, hard alkaline water, mid to high seventies, get fry from four or more different breeders, putting one of each in your tanks. When you get a pair, remove the other two. If they pair up in a new tank, keep them. If not, sell them or give them away. Remove fry when they reach about one inch and grow them out in 55's or 75's. Feed fry and adults newly hatched baby brine shrimp, live daphnia, microworms, quality carnivore flake food or earthworm flake food. Make small water changes very frequently, daily if you can. Julies don't like changes in their water, so you need the stability that comes with very frequent, very small water changes. Julies bred brother to sister produce slow growing fry. Julies like to hide their fry in pits, so the lava gravel is light and interlocks, greatly reducing the otherwise frequent collapse of steep walled pits that bury the fry.