Did you get a guaranteed pr (1male & 1 female)? Males will be colourful and bigger with longer pointed dorsal (top) fin. Females should be yellow and smaller than the male.
Temperature, about 26C
PH, about 6.6-7.6
General hardness (GH), about 50-150ppm
Food, frozen bloodworms (little red things), brineshrimp, daphnia, bits of raw prawn/ shrimp, and a bit of flake or pellet food. Remove any food that doesn't get eaten within a couple of minutes, and feed the fish 2-3 times a day.
Do a partial (20-40%) water change once or twice a week. If the fish don't breed within a few weeks try doing a 40-50% water change each day for a week and see if that gets them going.
Tank set up, have a few plants (plastic or real) along the back and sides. Have a ceramic flower pot in the middle (or make a cave out of rocks). Have the opening facing the front of the tank so you can see what is happening inside.
Air operated sponge filters are less likely to suck up the fry but small power filters can be used if you put a piece of sponge over the intake.