Hi guys, I have a male German blue ram with corydoras, neon and rummy nose tetras along with one bristlenose. The rams colour is fantastic but I am noticing aggressive behavior towards the other fish. When he goes to the top of the tank and sees one of the corydoras on the bottom he immediately starts chasing and nipping it. He does that with the tetras occasionally, but besides the fact he bullies the other fish, there are no signs of injuries and they are all healthy. I'm just a bit worried incase my fish get hurt.