Do the tiger barbs get more aggressive as they get older? I have some but they don't bother anything else in my tank. I do plan on giving them a bigger tank in the near future.
Well the amount of aggression from the tiger barbs is usually related to how many you have. Size doesn't play as much of a factor. If you have a ton of them, they will usually just focus on harassing each other, while just one of them in a tank will most likely try to destroy everything.