obviously opinions will vary a little bit, but i'm wondering what types of gouramis can live comfortably in a 20 gallon long community. preferably a pair. the tank is very well planted and sheltered. it has a slow water-flow and its pretty much an ideal environment for gouramis. also keep in mind that a 20 gallon long is 30 inches long which is comparable to a 29 gallon high in terms of side to side roaming space. i also realize that tankmates will vary a bit depending on the aggression of the gourami species. thoughts?