I typically fish for perch but my tipups have 50lb test Dacron line on them. You know for that 50# perch I'm hunting for. ;-) It is just easier to handle when fighting a fish and when its piled on the ice, it won't tangle as easy as the thin stuff. Just finish up the end with whatever leader material fits your fishing. Going for perch, I use 6# fc w a double treble rig.