So, Ive been watching my tank very close for two days. I know my plec died sometime while I was on vacation out of town. While watching my tank these last days, Ive noticed that the tetras seem to be trying to bully my swords. Ive even seen them slam into the corys on the bottom of the tank. Is this normal? if not, what could be causing the aggression? If I need to re-home the tetras, Im not as attached to them, but I love my swords and platys.