Hi, I just joined the site and also just got my first Silver Arowana from my local ACE Hardware. He's a baby of about 4 inches and I currently have him housed in my 125 gallon South American mostly catfish community tank. My girlfriend and I are getting heavily into keeping varied fish in large tanks and are planning to buy a 220 gallon to move him into in a year or two when he seems like he needs it. How much larger should I go than 220 or will that work for him and are there any significant things I should know that I might have missed while researching them? I want to provide the best quality of care as I can for whatever fish I buy. I don't have any pictures of him in the tank, only videos so here's a pic of him in the bag.