I love Tiger Barbs, so I thought if I purchased some in a big enough group of 8 and at a very small size they would be fine in a community tank, all was well for about 5 weeks, they where great to watch having little fights with each other and swimming all round the tank, even they way they slept was pretty cool. One morning I got up, went down to the tank and the only fish I could see where the Tigers, on inspection every fish was in hiding. As soon as any fish would venture out, bang - Tigers on them in seconds, like Piranha's! couldn't believe it - went on for 4 hours before I had to remove them, it was crazy - nip nip nip at any fish that dared come out. Tigers rehomed and won't be getting any again unless there going into there own tank, super little guys - super bad attitude if placed with unsuitable fish, lesson learned.