I just saw an episode of In-Fisherman where one of the guys was using a new type of line that is color coded every 25 feet. For every 25 feet of line, the lines is a different color. He just counted out the different segments and and multiplied by 25 to get his desired depth. Apparently, the line is transparent in the water so the color does not affect the fishing. Cheap alternative to line counter reels probably. Can't remember the manufacturer but I am sure Bass Pro or Cabela's could help. Just thought I would throw that out there.