Frog pond

[Evilmushroom]

Hello, i'm thinking of making a frog pond and i couldn't decide on what kind of fish to put in? i need a fish that my frogs can also eat, i was thinking mosquitofish (gambusia) but i'm going to have Chilean widemouth toads in it (Calyptocephalella Gayi, ex Caudiverbera Caudiverbera), and they get kinda big, about 19 CM (7 to 8 inches) so i don't know if they are a good food source for my frogs in the pond.
please tell me what you guys think

P.S they have similar behavior and needs to the American Bullfrogs (rana catesbeiana)