i have a 55g with 3 tiger barbs, 3 pink danios, 2 zebra danios, 1 common plec, 1 sailfin plec, 2 bolivian rams, 1 germany ram, 4 corys and 1 emperior tetra
they all do very well
the tank is highly planted with lots of stuff to break up the line of sighttigers dont bother anyone but themselves...