I'm guessing it's a decoration.What is that lion fish looking thing?
If I were you, the one thing you can do to help an aro get acquainted with its new environment is to lower the water level significantly. I would then raise it a few inches over a few days and keep doing this. It will help him gain confidence and be sure to make sure there are no other fish that can bully him.
What is that lion fish looking thing?
That's like saying a stingray pup needs to go into a 400 gallon... I have a 18 inch arowana in a 180 are you trying to say I don't know what I'm doing?"I just bought a silver arowana" "yes it should be in a bigger tank but I didn't buy it, it was an accidental gift" Not trying to sound like a dick but come on. You shouldn't have a silver
arowana in anything smaller then a 6x3 and it still might outgrow that. unless you decide to have an indoor pond or set up a very large aquarium I'd bring it back or sell it to someone with an adequate home for it.