There may be 100 threads on that subject. Use the search function and you will find all kinds of opinions/posts. Just search with various spellings because a lot of people get it wrong. Fluorocarbon, most frequently abbreviated fluoro.
Seaguar InvizX Fluorocarbon Fishing Line Test: 6 lb.
by Seaguar 200 yds. for $17 also a 4 pd-any one try this ?
Seaguar for salt water leader is the best-
Might be good for fly fishing tippets.Price is right-lol
Regular Frog Hair is a copolymer, not a fluoro. Thats a common misconception. I didn't realize Frog Hair even made a fluoro, but I guess they do, it's called Frog Hair FC. Never tried it or even seen it.
Of the FC's, I like Seaguar Grand Max. I use it on steelhead, but thats about it.