Are leaders necessary for toothed fish?

[Bowhunter57]

My concern is with pike, trout and walleye. I'm currently using 6 lb. mono line and no leader, for ice fishing.

* Is a steel leader necessary?
* If so, how long and how heavy?

Thank you, Bowhunter57

 

[Mike]

I don't ever use leaders. Not even when trolling for Muskie.

 

[uglykat26]

i stopped using leaders long ago , i use a double mono leader now