Having snails in the tank to eat the leftovers could help. This is where you would welcome snails and the would bring protozoans along to feed the fry. A ball of moss will help grow the protozoans in the tank too.
Pictures!!! I apologize for my lack of talent with a camera. It also didn't help that the female kept hiding every time I pulled out the camera.
I had a really tough time with the fry because they are just so fast, but you get the general idea. They look like tiny tadpoles.