Thanks for the info lateral .
Vixen , you've been in a quandary for quite some time now
, a couple of months ago it was apistos or chocolate gouramis
,
I would say if you can get the nannacara , get 1 male and 2 females , if you had a larger tank say a 30 gal , then I would say get a male and a female.
They love to breed and will do so almost instantly [ I.M.E ] .
Just remember the males and females look very different , the males are much more colorful , not to say the females aren't a beautiful fish , they are , just not as colorful.
Males are usually twice the size of the female and he will become almost relentless when it comes time to breed , you'll need many hiding places / lots of cover in the form of plants/ rocks/ caves .
Whatever you choose to do , good luck with it .