I know cleaners and peppermints will breed often. I believe they are ----changes--will change --- to breed when they need to. So if you get 3 or more of them, and they like their new home, odds are you will get babies. 2 weeks ago I got 3 peppermints, and now one is loaded with yellow eggs (you can see them in her abdomen, since her body is transparent). Really cool!
sam