Anyone have any idea what type of plants and fish would be found here? Despite spending way more time than I have searching the web, I am still at square one. We have built a vivarium. The back is land and the front is a river set-up with flow that varies from sluggish to rapid depending along the channel. The vivarium is going to hold a tanzanian frog from the Usumbara mountains we have (looonnnggg story). Trying to find plants and fish that would be appropriate. Maybe impossible? Any suggestions welcome. Thanks!