my girlfriend got tired of Fish the
goldfish getting nipped by her serpae tetras. I told her it wasn't the best combo but she lked how they looked. Well, today she insisted I get them out, so I put them in the tiger barb tank. Those tiger barbs immediately went after the tetras - it was like a gang fight where one side was just destoying the other. The fight lasted about 20 minutes before it just stopped, as if the dominant female just called off the attack. Perhaps that was their tank initiation. We'll see what tomorrow brings.
Just another example of the aggressiveness of tiger barbs...