I once had clawed frogs and they bred several times.
I kept a batch of about 30 tadpoles.
I fed them dried nettles leaves reduced in fine powder, but also yeast (not too much at one time because water pollution may be dangerous).
Finally, I gave them finely powdered fish food and green algae obtained scratching dirty glasses of an aquarium.
I ended with 8 froglets.
Caution ! this species can colonize ponds and marshes in temperate country. Do not release any outdoors if you have more success than you expected.