Ah, feed fish food to tadpoles. Why didn't I think of that? It is a good idea. Thanks for enlighten me. 
I did not have any fish at the time I had those tadpoles many years ago. Now I do. I have plenty of fish food at home. At the time I fed them cooked millet. I didn't think it was a good idea but I didn't know what else to feed them. No wonder most of them died.
I know it should be easier to feed the adult frogs. Everyone and their moms know frogs eat insects. Get those live feeder insects from any pet store should be good enough for the frogs.
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