It depends on the betta. I have one male betta I could put anything in with and he wouldn't bother it (except maybe another male betta) and I have two other male bettas that would make life miserable for anything I put in with them, even a snail. You would just have to put the frogs and betta together and watch them closely for awhile. Be sure to have small hidey places for the frogs to escape if the betta becomes agressive.
If, for some reason, it doesn't work out, the little frog can be accommodated in a very small (one gallon) container. So, it's not a bad idea to try them together.
yeah i reckon with inchworm, IMO u should consider the tank size , like i dont think in a 1.5 gallon tank should have enough space to put them together cus in that case the betta should get very territorial and agressive as well i think in a 2.5 gallon should be ok , plz somone correct me if im wrong
Just about anything peaceful and not overly fast. Fast fish will out pace the frogs for food and they can be stressful to the slower moving frogs. A lot of the community fish you see are fine with them. Just make sure the frog gets its own food allotment from the fish.