I think you are referring to flourocarbon line. Pretty nice stuff for ultra clear conditions, but I don't use it very much. Have always had problems with knot strength. In my opinion, it is kind of a trick to make sure your knot is right.

Lot's of guys around here, have had problems with the Berkley Vanish. Seems like to flouro made by Segar is better. Hope this helps.

Another opinion. If you are just starting out, work on developing "feel" and your presentation right. Those two things make up for a lot of little technical stuff. The rest will take care of itself.