Jay, there is something more going on. There were three or four batches covering different years. AND they were All rotten. The break point was higher than really rotten mono, but it was there. They broke without a knot, merely me pulling them. It did not matter if it was the beginning or last part of the roll. The break was the same. Ok, seems like you know more than the fishing expert. So is there any data on lifetime of FloroCarbon?? Anybody have old dated FloroCarbon they can test?? I did notice on the new stuff there was a space for me to write in the date. Thanks for the tip on SeaGaur....I think I will look for it at Bi-Mart.