I keep mine divided until I see them trying to slap each other with their tails. Then I take out the divided and keep the big net handy. Usually they lip lock (no more than 2-3 seconds) a couple times. If the liplocking goes on much longer or if I see a little damage I put the divider back in. If not then I keep a close eye on them and keep the cold water changes coming. Sometimes they lay eggs quickly, sometimes not, fish have personalities I guess. Some are horny lil buggers, some are not. I used to think my main male was ***. Be patient and hope for the best I guess. That's what I did.
