if the tiger barb group is large enough,and the tank is planted
both ends,with free swimming space,you should in theory have happy tigers,
and they'll keep nipping within the group.
i have serape tetra in with mine,i have in the past kept and array of
fish with tigers,and as i said as long as they are in a large group,not only
do they look fantastic,but they should leave anyone else alone.
here is the fish past and present i have kept with tigers.
serpae tetra,neon tetra,rummy noses,corydora catfish,banjo catfish,
bristlenosed catfish,pearl gouramis.black phantom tetra.
gupys.clown loaches,yoyo loaches.