So i have 2 55 gallon tanks right now but i need to move my arrowana shortly hes getting large, i was reccomended a 180g tank. I also was thinking about buying a stingray to put in there with my aro, and maybe another aro. What All would i need for 180g? I was told a canister filter, was better, i just have never owned a huge tank, and i dont want to mess it up. Thanks