I know the answer is probably no, but can dwarf Gouramis be kept with female Bettas? I had them as a kid and would love to have a pair again. If it's not possible that's fine, I understand they are very similar fish.
We have 2 dwarf Gouramis in with 2 female bettas in our 40g community tank.
Have had absolutely no problems or picking with each other.
Had 3 dwarf Gouramis but a lyretail molly stressed him out (shes gone now)
We will be adding more with possibly more female bettas..you shouldn't have a problem.
I know they're in the same family as the betta, but like I said..we have had no problems.
Our dwarf Gourami built a bubble nest one time and one female betta started getting lines and would go under it. (Lol, I guess she thought that would work.) He never chased her or showed any aggression.
From what I heard, they are like cousins to bettas. They occupy the same level (middle and top) of the tank, and are agressive as well.... in smaller tanks, it is not a good idea. In some giant tank with plenty of hiding spots, it's probably safer... Every fish will have its own personality, so how they will go together could really vary.
I (personally) wouldn't try it in anything less then a 40 gallon. And definitely not with a pair. They breed just like bettas and will become fiercely territorial when they're breeding. Two males will most likely fight. I originally had two males in my 16 but one started bullying the other so he was returned the same night. They really need 10 gallons each, minimum. I found that out the hard way.
Mine is a very fast swimmer and food bully, so that's also something to keep in mind. I don't think I would do it. A sorority is high stress as it is and I think a dwarf gourami would add unnecessary stress.
Watching my guy cruise in my 16g, I'd never recommend 5g. He's just too big and active.