2.2kg beef joint - how long in slow cooker?

[PrinceRogersNelson]

I am doing a beef joint for lunch tomorrow and to make my life easier I was planning on doing it in the slow cooker.

2 questions:

How long do I need to do it for? I have high and low settings.

Do I need to do anything to it to make it more delicious?

Thanks

I cooked beef in my slow cooker recently. I made up a jug of granule gravy first and then cooked the beef in it all day. Best beef and tastiest juice filled gravy ever!