Peas will do the trick, I've used that one as well as soaking food in mashed up garlic then feeding. But if in future you decide to try your hand at breeding, there is a lot to it and you need to research how best to do it. For one thing, males and females cannot be kept together, they are conditioned separately and slowly introduced to one another. The male builds the nest, and after the eggs get fertilized he moves them to the nest. If you don't remove the female at this point he will kill her. There's a ton of data out on the net :)
We grow too soon old, and too late smart.