A friend of mine has a dub colony about like yours with a 50/50 mix, I also have a large colony of moliros that is male heavy a bit... Long story short both colonies produce fry... I am with you I like bigger colonies myself, you can take extra males out, but in a bigger colony it is not always necessary!! (I would not if there is no aggression issues) I think you will get fry soon enough... Your fish are probably still establishing rank and territory if you have not had them for too long. :thumb: