My first attempt of slow cooking

[Katymac]

My friend gave me a slow cooker

I have put in a lamb shank, mixed peppers red onions carrot & a stock -- then I have stuck it on slowcook for 5 hrs

Is that OK?

Low or high?

Well I wasn't sure so I brought it to the boil on the hob then transferred it & it's on 80 (which seems very low)

Do I need to turn it up?