Exodons are tricky since they're so aggressive even with each other. You'll need a separate tank with lots of fine leaved plants or a mesh bottom so they don't eat their own eggs right away. Try lowering the pH a bit and feeding them high quality live foods to get them in the mood.
Just a heads up that they're egg scatterers, so once they're done spawning you have to move the adults out fast.
Good info, the mesh bottom or heavy planting seems pretty much mandatory with exodons. Pulling the adults immediately makes sense given how fast they turn on the eggs.
