Hello all, I'm wondering when is a good point to act. I'm getting worried about 1 of my yellow labs. I have 4 of them in a 55 gal with 2 OB zebras and 2 juvie socolofis, I want to get to the point here. How much is too much? My dominant yellow lab about 3" will chase and nip at one of my other ones. I believe it is a male as well, I woke up this morning to him hiding in the corner of the tank and some of his fins areally pretty torn up. Which of the 2 would you recommend removing? I'm thinking of pulling the stressed one and get him all fixed up. But where do I go from there?