So I added 6 convicts over a month ago to try and clean up some of the mess my fahaka puffer leaves behind when he eats. I got them at not even an inch and basically expected the worse but hoped for the best. Well not only have the convicts survived but two have paired off and are protecting the inside of a rustic plane I have in the tank (eggs/babies?). Even more unexpected still is the fact that it seems the Fahaka is being slightly bullied by the female, he tends to lean away when she threatens him and she will actually nip at his body (which does absolutely no damage but he hasn't killed her yet so it must not bug him too much.)