You should get 1 male and 1 female. Get a 10g tank with 2 weak filters and a see-through divider. Cycle the tank well and get lots of floating plants or fake plants, it doesn't matter. Make sure the pH is around 7.0. Feed them fancy food IE freeze dried/frozen blood worms or krill and chopped up earthworms. The male will probably attack her a couple times, just slowly introduce them. 10 minutes each day. Than replace the divider.
Good luck!