You asked for and honest answer and that's what everyone gave you. If you've kept a silver arowana before then you should already know that when young, they grow about 1.5 inches per month and that as adults, they are potential 3 footers. If you don't plan on upgrading anytime soon, I would hold off on getting it. The less space you give it to grow in while young, the higher the chance of it injuring itself. In smaller spaces they will feel cornered easily and will be more jumpy than their normal skittish selves. So unlike most other fish, when they run out of room, instead of swimming quietly in a small circle, they jump a lot more and will possibly injure its spine or escape the tank to its death. Then not only will another poor aro suffer a premature death, but you will be down 60 bucks.
We're just trying to help you avoid making a mistake that a lot of others have made. We've given you the info, what you choose to do with it is up to you. Think hard and plan now, instead of worrying later. Just my 2 cents.
