i was considering this tactic. Are the 3 living in a 20 or 30 gallon breeder? I viewed a youtube video produced by a breeder who did this in order to get the pair to either spawn or to choose a mate. I have a female who will lay eggs but the pair that was confirmed the male will chase her away from the wigglers. I switched males, she spawned again. But the male did not bother to fertilize. I will be curious to learn how your experiment turns out.