Yep, sure they can. I have a 10gal with two female bettas, three ADF's and a ghost shrimp. You may need to squirt live food at the frogs, (maybe with a turkey baster) i might say they are essential, mine will not accept anything else. Actually, squirting might not be needed, it depends on if the betta likes live foods- mine will go at it!
By the way they african dwarf frogs live to eat worms.
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