I have some guppies that I want to start breeding. Up till this point, I have had my males and female separated. I just put 2 females and 1 male together in one half of the female tank. How long should I leave them together to ensure that they are bred, before putting the male back in his normal tank and taking out the divider? I would assume it won't take terribly long, but I don't want to take him out too soon.