I am farely new to this forum so forgive me if this has taken the rounds before. How many bother using tapered leaders on a sinking line or just plain ol’ mono (even flouro)? How long? And I got to know how long of leader do you use on the clear intermediates.
she who dies with the most toy’s wins.
hiya FG…I fish stillwaters in south Okanagan BC Canada…eh… 
)…when fishin’ deeper than bout 10 ft I use a full sink line with a 8ft section of Maxima Ultra Green mono…often when fishin’ chronomids I’ll tie on a small barell swivel and add a lighter tippet to that…helps sink yer line…and the distinctive dubbl splash when both fly and swivel drop tell me the lead is pretty much straight…you’ll learn fast enuff if the splashes are too close together…indicating a cluster-thingy happenin’…on the clear slow sink type lines…I have the SA offering called the Mastery Stillwater line…I go with a tapered leader on this line as it is a really slow sinker…1-2 IPS…when usin’ this line I’m often on the shoals so a longer lighter leader is required…no swivels here…and tippet is long as well…I’ve used upto 20ft flyline to fly in some situations…but usually 12 ft is a good startin’ point…works for me…your milage could vary… ))
mojo
I fish 98% of the time fishing still water and I use a taper leader in a 7 1/2 foot length. If the water is really murky the I use a 6 foot. Depending on the size of fish I have the opertunity to catch I use a 4X to a 3 X tippet
I prefer a 9’+ tapered leader on the slime line and a straight 4-6’ leader on a fast sinking line
FG,
We toss LC in somewhat “un-pristine” water. We generally start out with around 9’ of leader (with tippet) and change leaders when 4’ or less is reached, due to knots.
Pretty much the same drill when useing a “sly line” in clear envirions adding about 4’ to the #‘s. Like 12’ long and 6’ short. :wow Great math, huh? 
If you are trying to keep depth in MOVING water, SHORT leaders are advantageous. As short as 4’, tapered or not.
....lee s.
FG,
It depends on your fishing situation, of course.
Generally with a full sink line I prefer a short level section of mono or flourocarbon, around 4-5 feet. I’ll use it until it gets down to 3 before changing it.
For the slower sinking lines, it really depends on what presentation you are after. For spooky fish in real clear water, a long tapered leader is sometimes required. When you are using a non weighted fly and want the line to give it depth, then you are better off with a shorter leader, otherwise it takes forever for the fly to get down.
It all works, you just need to adust things for the condtitions you face. Think about what you need the fly to do, then adjust the line/leader acordingly.
Good Luck!
Buddy
I don’t still water fish for trout much and don’t need a sinker on our smaller streams.
On warmwaters, I’ll limit my straight mono leader to around 5 ft.
Jeremy.
On fast full-sinkers, I will use 2-3’ of an old tapered leader that was too short and add a couple of feet of tippet. On intermediate lines, I use something similar to the leader for floating line, 7 1/2 feet usually.
Depends on the presentation, I’ve used level leaders as short as 6 inches on Coho on a Teeny T-300. You have to get the fly where the fish wants it.