Hi Cammy
The barbs are probably the most aggressive fish in the tank... they have established a pecking order and there is a few barbs I have nick-named "Helicopter" due to there fins being half eaten off.
originally there were 15 barbs; 3-4 of the albino barbs are now dead + a couple are in bad shape...because there are so many barbs they mostly chase each other around and leave the rest of there tank mates alone..
all the other fish are very friendly and they all get along great.. because the loaches have the strangest sleeping habbits they are probably my favourate... i thought one was dead when i first saw it...
pic from google of a sleeping clown loach: