I started with three adults, a male and two females, that were only born last year! I got them in Feb. from M. Shrom. I thought it would be another year at least before they were old enough to breed. I have already given away 8 of the larvae, a couple of which have morphed since I gave them away. I have at least that many left, and as the larger ones go off, the smaller ones can start growing more.
The ones I have left vary in terms of development, some still brown with complete gills, some closer to morphing, as the pictures show. In two weeks, I decided, I'm going to redo the tank, and the parents' tank, and put them all together. They're all too big to get eaten now, and if I clean the tanks of debris, I can see them better. Debris has accumulated since they were eggs, leaves and such that have decayed. I've done small partial water changes on the larvae, but it's about time they get a better cleaning.
p.s. thanks for the positive feedback, Heather!
p.p.s. I just checked on them and see one of the ones I have left HAS morphed, and is hanging out on a piece of floating cork.