Flashers for ice fishing

[TubeDude]

The main problem with Hali-style rigs or any rig with the hook dangling loosely below a weight is that you'd never feel an "up" bite. Crappie in particular are famous for mouthing a bait upwards - which is why crappie bite are often described as "really light"

True enough.  But on most trips the ratio of "up bites" to detectable munches is fairly low.  If the fish are mostly acting skittish...or are otherwise biting so that their takes are hard to detect...then a different rig is in order. 

In truth, most of the time I fish the Hali-style rigs I am fishing for perch.  But even perch can be tough to catch if they are biting light...or upward.  That's why it pays to have good sonar or a camera...to see what is going on...and to adjust your tackle and techniques accordingly.