You keep pairing them until you see an ovulation. I started breeding Echo last year to Oliver in early October. She didn't ovulate until the middle of March.

As for maternal incubation - once you see the female after she laid the eggs, you really aren't going to want to let her incubate. They look so incredibly emaciated, that it's shocking (or it was to me). They will not feed while they are incubating - I'd much rather not leave my eggs in a tank (they're not even in a tub) and hope for the best. I'd rather have them artificially incubate where I know the temps are perfect all the time. And I'd rather give my female a rest and start getting her feeding again.