I have not tried the RIO indicator leader. I think it is designed for lake fishing.
NEW for 2009
These 10 ft (3 m) tapered leaders feature a short orange butt section for attaching an indicator to, followed by a very long fine, level tippet section of about 7 ft. This is an excellent leader for chironomid fishing or whenever you need the flies to sink fast. The long, level tippet does not slow down the sink rate as a more conventional taper does and the heavy butt section makes casting the indicator easy. Ideal for nymphing out of a drift boat or in lakes.
10 ft (3 m); 6X - 0X