My oscars about 4-5" got the poop beat out of them last night, they have paired an are the biggest an calmest fish in my tank. My tank also has 2 small plecos an 1 male convict about 2" but he is super aggressive. I also have a 3" female JD very relaxed an a 2.5" GT also very relaxed. The tank is a 60 gallon an I am in the process of upgrading to a big tank. What should I do??also all the fish won't be going in the big tank.