Hmmmmk fc leader is not made of swiss cheese.
I.m.h.o......
1. Fc leader should be changed at least after every 2nd if not every session ..to ensure its integrity is there, and to ensure your knots are up scratch.
2. Ive used it in both salt water clear n muddy, beach, rocks, fresh water muddy and clear. ......... it still catches fish.......
I dont think fish use a microscope To view the line, fc always gives better performance than plain mono in hook up rates. ..... my 2 cents......;););)
Tight lines!, Shakeel