Just be careful when adding fish and other aquatic animals to the enclosure. When buying ask if the aquarium from which your critters are coming from has had any African or dwarf clawed frogs in it or is connected to another tank that does. The reason being, these frogs are know carriers of chytrid, a fungus that is killing amphibians across the globe. It doesn't kill them, but potentially kill other frogs. If the tanks are connected but there is a UV sterilizer between them, then its ok.
Also do not mix frog sizes. A $15 red-eye is most likely a captive bred froglet, and thus real small. Putting it in an enclosure with adult red-eyes you run the risk of canibalism. I have never seen it in this species, but why take the chance.
Also quarantine any new frogs for 30 - 60 days before they are added to your establish frog community.