White check tang beating up new Harlequin Tusk

So I got a Juvenile Harlequin Tusk yesterday and my tang is beating him up to heck!!!! I don't mean a little tail slapping and a little chasing, I mean a LOT of tail slaping and chasing!!!! I don't want him to stress the tusk more because he is a juvenile and I know those are more sensitive. What do I do??? Give my tang a time out in the sump? How far do I let the chasing go??? I am not going to put up with him doing this for long!!! I will put him in the sump if I half too!!!! HELP!!!!!!