Welcome to the Amok Time!! It can last from two months to six months....even though it feels like years......Just beware of him at all times and be ready to move quickly. If he gets ahold of your clothes or you, put some alcohol on your finger and put it NEAR his nose, don't let him lick it or get it on him. Igs will usually let go when they get a whiff of it. After a while, my Tank would just see the alcohol bottle come out and let go.