Thank you for the trust, but the opinion is usually not mine. When I do the profiles, I spend hours (quite literally) on several sites for research. Obviously I can't know all this stuff, not many can for every fish. And the sites I use are not just "hobby" but scientifically-oriented. I have very rarely found differences between them, though there is sometimes a variance with respect to water parameters. I also use (when I can get/find them) specific scientific studies and articles on fish species and these carry weight should there be variances. I compile all this info and write the profile. It takes me 2-4 hours per profile. So the point here is that what you read in the profile is not some aquarist's idea, it is the consensus of highly-knowledgeable aquarists and leading ichthyologists. Just a bit of background.
I just read over the profile and I think it needs some revision. The tank size and comments are obviously aimed at keeping a small group. Something needs to be said about individuals/pairs.
I wish more people would read these profiles and provide feedback like this. I keep mentioning them because I sometimes feel they are not being used.
Thanks for mentioning this.
Edit: Might as well answer the specific question I guess. One in a 10g yes, but not a pair [except as a spawning tank] as there is not sufficient room for the female to escape the male's advances from time to time. One in a 10g would work as this being a gourami needs quiet still water, not an active swimmer, cruising around plants (floating especially). I do not consider 5g sufficient space for a 2 inch fish. I just went back through some of my references and the majority suggest a 20g 24-inch tank is the minimum even for one or two.