I have a small shoal of 8 Lemon Tetras... they have only been in the tank for a couple of days but seem very comfortable.. They feel free to wander and explore on their own and they don't feel like they all have to be in a school. I do have one though that seems to bully a couple of the others. He chases them from one end of the tank to the other. I was very surprised to see this behavior from them.. Is this normal or the sign of something else??? BTW its a 38 gallon tank that is planted and has plenty of hiding spots with some floating plants as well... Thanks