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I've heard that you can use smelt in tip ups also. And I've heard that in minnesota they arre pretty effective for northerns and event walleyes. I'm sure that if smelt work sardines will work also.[/quoteSmelt here in wisconsin works great for northern pike.Use them on a hanger hook and use nails to balance it out to hang straight.This is the only way I fish for northerns.You can expect 30in.or better fish]