The place where the eggs come out ( sorry for the non-proper terminology ) is different from one another. The one i believe to be female has a much larger protrusion than the other. It looks like they are about to lay again, and of all places there cleaning the heck out of my MAG FLOAT. I also cut some fabric to cover up around the tank. Try to give them some privacy. Its no big deal im just happy to have some others to discuss this issue. Maybe the conditions just aren't right yet.