The answer is no. Mixing species is frowned upon. Mixing anything smaller than its mouth with Phyllobates will result in the Phyllobates trying to eat it.

The tank size you would need to even remotely succeed in this will be FAR FAR FAR larger than 1 tank per species will be.

Some reading:
Read before starting mixing/cohabitation/water...

 

What @fishingguy12345 said. My terribilis occasionally try to eat me. I'm not even joking, they attack.

They often go into a feeding frenzy, and will charge each other and even (lightly) bite each other on the face or wrestle over food.

I don't think they would recognize a different genus as a frog to wrestle with (that's more of a ritualistic thing amongst themselves), but they will out-compete and stress them out if not outright try to eat them. I can't imagine it going well. And just when you think it's going well you'll find a terribilis with frog legs hanging out of its mouth.

 

What @fishingguy12345 said. My terribilis occasionally try to eat me. I'm not even joking, they attack.

They often go into a feeding frenzy, and will charge each other and even (lightly) bite each other on the face or wrestle over food.

I don't think they would recognize a different genus as a frog to wrestle with (that's more of a ritualistic thing amongst themselves), but they will out-compete and stress them out if not outright try to eat them. I can't imagine it going well. And just when you think it's going well you'll find a terribilis with frog legs hanging out of its mouth.

Hi Fahad. I was deceived by their froggy cuteness. Since they're little savage beasts. I guess I will have to decide which one species to keep. Thanks for making me laugh, love and appreciate your sense of humor. And thanks to the administrators for pointing me in the right direction.

 

Please read the stickied thread fishingguy linked, and after that please use the search tool. There is MUCH more that can be said on the matter than anyone could (or wants to) retype here. There is over a decade of discussion in the archives, and the devil is in the details.

 

Mixing is a terrible idea but trying to mix anything with terribilis is insane. They would outcompete anything put in the cage with them. That is if they don't eat the other frogs. Personally I'd get some terribilis and enjoy the hell out of them because they're amazing frogs.

 

I understand that mixing frogs is frowned upon for a couple of reasons but I was wondering if a mixed species tank would work?

I think you sorta answered your own question here. Asking to mix frogs is a heated topic around here. Just be careful when you receive advice you don't like, cuz its gonna happen.

 

If you have to ask, you do not have the requisite qualifications or resources to do a mixed species tank.