Home bred feeder guppies as food for pacman frog?

[mafoo]

kinda interested in breeding my own food since i got a small tank (2.8g) with a filter and im thinking of having guppies and feeding them out to the frogs. i know i wouldnt be able to get much of them in that tank but is it still possible? no way im buying guppies from a store since they are usualy sick there so i plan on breeding my own. no clue how to do it but is it possible in such a small tank and tips on the basics of doing it would be nice to. ill be giving the pacman frog nightcrawlers as a staple but guppies will also be fed often im thinking. also are these guys fatty like mice where u cant feed them often? if thats the case then there out probaly. also ill probaly be feeding a few small ones to my firebellys to as a treat. if its not going to work for these animals or for the small tank dont bother letting me know how to do it cause what i got is what i use and probaly aint going to buy anything more.

[SludgeMunkey]

Fish in general make pretty lousy feeders for amphibians. The nutrition just isn't there.