Set up a separate small tank in which to spawn the fish with clumps of fine-leaved plants such as java moss to act as a spawning medium. Water parameters aren’t really critical, but very alkaline water should be avoided. A small air-powered sponge filter completes the setup and will provide adequate aeration. The fish should be conditioned in a group in a separate tank on a high quality diet of frozen and live foods. When the females are noticeably full of eggs and the males are displaying their best colours, select the fattest female and best-coloured male and transfer them to the spawing tank.
Once they are in situ, continue to feed lots of live and frozen foods until you notice eggs.