Originally Posted by Joe_D
Question.. can you then keep just one Dwarf Gourami in a tank?
I cannot say definitively yes or no on this. In a larger tank like a 55, you could probably have success keeping like 4 or 5 together. Increasing numbers like this to diffuse aggression is a trick often used by people who keep Mbuna cichlids. This way a dominant individual cannot harass a single subordinate to death. Also, most dwarf gouramis sold in stores are male as the females are not as flashy. This does not help as they tend to be more on the aggressive side as well. There are also other species like honey gouramis that tend to do just fine in groups and actually appear to enjoy the company of conspecifics. Really there is not a catch all answer for this. In my experience though, whenever someone just puts two dwarf gouramis together (powder blues, flames, gold, etc.) it always ends with one getting beaten up on. For this reason I never recommend pairs of these fish.