I just want to say, DON'T get the Tiger Barbs. They are beautiful fish, and very active and fun to watch, but they are very aggressive. We had a school of fifteen that killed each other off until there were only three left which we then rehomed. Nothing we did made them stop doing this. It's awful to watch them single out one of the group and pester it relentlessly until it dies. I have also had other people tell me they had the same experience, so I just wanted to put that out there to help you avoid an upsetting situation.
Kindness and respect should be shown to all animals, no matter if they are furry, scaly, big, or small. Be a hero to the animals and GO VEGAN!