I have a 55 gal tank that I keep:
1 large silver dollar, 1 large kissing gourami, 2 gold gourami's, 1 neon fire gourami, 6 3spot gouramis, 6 tiger barbs, 2 cherry barbs, 2 tetras (buenos aries i think) 2 plain corys, 2 albino corys and a pictus catfish
The only ones I have any trouble with are the tiger barbs, but they only attack each other.
1 large silver dollar, 1 large kissing gourami, 2 gold gourami's, 1 neon fire gourami, 6 3spot gouramis, 6 tiger barbs, 2 cherry barbs, 2 tetras (buenos aries i think) 2 plain corys, 2 albino corys and a pictus catfish
The only ones I have any trouble with are the tiger barbs, but they only attack each other.