I have had a male and a female convict for about a month now. They are in a 28 gallon bowfront with just a small clown pleco. The male is about 4 inches, and the female is maybe 2.5 inches. They get along. They dug out a cave where they have much privacy, and they hang out in there together a lot. No fry yet though! What are they waiting for? Do I need patience or a different male?