Here is my aquarium setup.
It has 2 striped panchax killifish, tetras, apistogrammas, cory catfish and snails.
There is a two-level amphibian platform at the top, upper level is dry, lower level about in inch in the water, for the frogs.
The fun thing about this setup is you can throw crickets in and the killifish and frogs both go after the crickets. They seem to not mind each other at all, the fish can swim up to the frogs while they're on the lower platform taking a bath.