I've got 2 dwarf gouramis in a 30 inch 29 gallon tank. With tetras.danios .barbs.rasboras.2 small cats.they seem to adapt well!bought2 blue gouramis into smaller tank with 2 small panchax.how many more species could I add.
I think it would help if your were to give a breakdown of your total stock and dimensions of the larger tank and the same for your smaller tank.
That way those who know far better than I would able to advise you.