Cod Fishing Tips and Knot help - Tie a snelled hook to a leader in Tackle and Techniques Posted April 16, 2014 Now that you mention it, I remember a seminar where a Captain talked about switching from mono and glass rods to spectra and graphite. He said he was amazed at the sensitivity and wondered how many haddock he had not even noticed with mono and glass. He spoke about how haddock kind of nibble as opposed to cod which hit hard. He also spoke about that stretch with mono that rolmops mentioned and said when you lift your rod as in a jigging motion, the rod tip moves feet but because of that stretch, a 16 oz jig may only move inches. Some good advice there rolmops.