Another topic that has been discussed in great depth here previously and we all have our own views on it.
I experimented rather extensively with fluorocarbon for ocean Chinook and Coho fishing and came to the conclusion that it was not necessary, not worth the rather exceptional cost compared to good mono leader and may actually result in more lost salmon from break offs.
Unlike well fed trout in a crystal clear mountain stream, salmon are not leader shy at all so there is no reason to have a leader that is a little harder to see under water at considerable extra cost. I even know of one fisherman who for some strange reason was using neon high res main line for leader (not something I would do as that stuff is designed to be seen) and was still getting lots of hook ups on Chinook and Coho.
If you want to increase your number of hookups and salmon in the boat in my opinion there are better ways to spend that extra money. If fluoro was any significant advantage for ocean salmon both the top guides and commercial fisherman would be buying it in bulk and using it extensively and neither are from what I have seen and heard.
Beyond that, I have found that it is more difficult to tie good consistent knots with the stuff compared to good mono, especially in the larger diameters and with more complex knots, although a drop of herring oil on the line as you cinch up the knot does help.
Further I examined the fluorocarbon knots I have tied with a jewelers loop (10 time magnification) and found that it was not that uncommon for them to show signs of internal stress fractures where they were pulled tight at the knot almost like you may see in a thick hunk of glass that has had a small impact. I think it is because it is very hard like optical plastic used in eyeglass and therefore more likely to fracture or break than the more stretchy mono leader and we did seem to have more break offs over time than with the same test mono line. Granted that extra hardness does give it a little better teeth abrasion resistance but that is a fairly minimal advantage.
Since we have moved to heavier good quality mono leader (especially with flashers) and change it out when it has teeth abrasions or has play a fair number of fish, it has been years since we have had a break off and I think our hook up rate is pretty darn good in our area for larger salmon.
People will use what they have confidence in and ultimately having confidence in you gear will put more fish in the boat and of course experimenting is half the fun.
