I recently set up a 10 gallon tank, and about a week ago I added 5 glowlight tetras. They all came from the same tank at the pet store, and they seemed to get along fine for the fist few days, but I've started to noticed that one, that I believe is a male, has started to chase the others around and nip at their tails. I think that the others are 2 males and 2 females, and the females seem to be getting the worst of it. The tank is planted and there's other decor that provides hiding places as well, but is there anything else I can do to curb this behavior? I've had a planted tank with neon tetras where most are male for about a year now and never had this problem with them. Are glowlights just a more aggressive species of tetra? Any advice is appreciated.