I think I put this thread in the wrong place the first time, so hopefully this is the right place to ask this. I haven't had a fish tank in a while, but I decided to get one again recently. I went to the pet store and the Platinum Barb's stood out to me because they seemed every active and playful. So I bought three of them and an algae eater. It was immediately evident that one particular barb was highly aggressive towards the other two barbs. I thought this was fine at first, that they were just playing, but he seems so aggressive. The two calmer barbs will just be chilling at the bottom of the tank or calmly swimming along, and the aggressive one will just start chasing it all around the tank, nipping at the other fish. I haven't noticed any physical damage to the two barbs so far, but should I be worried about the aggressive one? Is he stressing out the other two fish or is it all in fun? Any insight on this would be great, thanks!