Hey MFK, this week I have decided to let go of my Oscars, due to Excess waste & fighting, so it's going to clear some room for my other grow out fish, to grow out in this tank! It's a 150 Gallon & I know it's very small for the current fish but again, just a grow out, not their permanent life. So, I have a Pacu which is 12" in the 150, and a Silver Arowana about 11-12" as we'll in a 55 Gallon grow out. Since I'm going to be getting rid of my main bully's, I just wanted to come on here and just ask, Will the arowana be fine with the Pacu? Or will the Pacu fight with it & Nip it's fins & bully it? Any help is welcome, thank you in advance!