I recently purchased two Red Flame Dwarf Gouramis, and was told to be sure that I had sufficient hiding places (rocks, plants, areas) in my tank so they could lay claim to their own space.  This tank is a 20 gal. long.

The only other inhabitant of this tank is a Red Tailed Black Shark, but so far he hasn't caused any issues.

I once purchased two Gold Dwarf Gourami's but one killed the other within the first 24 hours in my smaller Q tank.  Guess they were a bit more aggressive, or felt more "crowded" by those circumstances, although they were the only two fish in that tank at the time.  Thought that would help, nope.

And yes, I did have a lot of trepidation before purchasing another pair of Gouramis... just couldn't pass up the coloring of this variety.

It did take them a few days for them to stake out their preferred territory, but it seems that they are now both quite happy. Knock Wood, Petrified, or otherwise. ;o)

One other "place" a Gourami feels at home is under a broad leaf floated on the surface. This is where they sometimes will lay their eggs if or when the time comes.  So much to learn...:o)  

I'm going to try to get a good photo of them in the tank to post in my album.
Will submit a diary entry when/if I can accomplish that.

Good luck and keep us posted.

gg
:o)