To prevent this problem, I always mark the lines themselves using this method: At the end of the fly line I use a black permanent marker to place different width rings around the flyline. Say my rod is a 7wt.--I place a quarter-inch wide ring around the line and two eigth-inch rings. These three rings are about one-sixteenth of an inch apart. So, you see wide ring means five, narrow rings mean one each--so you can mark your lines for any weight. Now, if you want to designate floating from sinking, you can start with narrow lines for sinking lines or start with wide lines for floating. Simple enough? Ditchdoc