They are wierd things thats forsure, we had bred convicts for awhile but all we did was made sure there were females and males and lots of hiding spaces and boom there were babies. DId no less and no more, than a friend of our wanted to breed them so we gave her our main breeding pair and she put them in a 125 with other fish(ours were in a 35) and she has had them now for a year and they have done nothing.