At my age I only go fishing on the rivers with a guide and in a drift boat. I always put on a fresh mono leader and I let the guides pick what they want for the tippet. Some guides use fluorocarbon tippets on dries. They feel that the tippet will sink just below the surface of the water and be less visible than mono. Other guides just use mono tippets. A short 18 to 24 inches of fluoro should not sink most dry flies, or if it does then either the fly is very small or needs to be treated. Most seem to use fluoro on nymphs.

Larry ---sagefisher---