Well you'll get better replies if you take a moment a read your reply before posting it. Also be specific, just asking about stuffs, isn't gonna get you a very good answer.
One of the "stuff" that you need is a very secure, sealed, and weighted top. Arowana are extreme jumpers and extra care needs to be taken to keep them in the tank.
How much fish keeping experience do you have? Is this your very first tank and fish?