Breeding fish isnt easy also its very expensive. YOu have to feed them freshly hatched brine shrimp as soon as their born and then an expensive liquid etc. Unless youve already read up on it, but its not always easy. Also you cant just breed them and keep them all youll have to cull some or youll end up with too many. If your really up for it and know what your doing then you could use a fry mop and see if any eggs catch on it. How large is your tank and how many fish?