I used to have one of those in my 3ft set up but as he was bigger than everything else he used to play 'the big I am!!' card.

I stuck him in my 6ft set up and that soon calmed him down. He is approx 3" and I have a bala shark in there that is three times his length.

the words "NOW BEHAVE" were shouted when he went in there.
He's now a well behaved little shark with his HUGE tank mates