I have also heard of this method, take a 6" piece of the fun noodle, place a large nail in one end towards the outside of the noodle. Then wrap you line around it, place some heavy sinkers on it and then throw it out. It will unwind the line till it reaches the bottom. The nail will keep it from rolling over anymore, in return not letting out any more line. Or you can just go to walmart and buy the marker bouys there. I think they are 2 for 5 bucks, they are cheap and they work also.
Ted
Neither snow nor rain nor heat nor gloom of night will keep me from crappie fishing!
2010 Lake of the Ozarks Super Slab Champion