Fluorocarbon when fishing with classic feeder and method feeder is now increasingly popular. Its biggest advantage is its very low visibility in the water. The material from which it is made has a very low refractive index. With a classic, it will allow you to target even the most wary fish. It is also great when fishing for barbel in rock-lined troughs. With method feeder, the thick fluorocarbon gives extra strength when fishing for large carp, amur and sturgeon.