If using a floating line, we can control or alter the depth our flies will be presented with a combination or leader length and size/weight of our imitations. Where conditions permit (a side or tailing wind) then longer leaders of some 18-20 feet with a team of three weighted nymphs will fish surprisingly deep. We can explore even deeper water by including a polyleader boasting a sinking density. Conversely, when trout are mopping up ascending nymphs close to the surface, long leaders and heavy flies quickly slip below their window of vision. Now, reducing leader length and the number of droppers coupled with lightweight patterns vastly improves the odds of your flies holding in that critical zone for longer. In extreme cases this could mean a single nymph on a nine-foot leader that is partially greased (diagram 5).