The easiest way to add a second fly in a tandem rig is to attach the dropper line directly to the hook of the top fly. However, some anglers struggle a bit because the knot slips off the hook or materials get in the way. Here’s a great tip from Doug Garvey of Anglers All in Littleton, Colorado. Not only does Doug’s method make it easier to tie on a dropper line, but it makes the process quicker, as well. And that means you’re back to fishing faster.

Thank you!!!! Wonderful time saver!!
Time saver and eye saver. Thank you!
Often times just a plain clinch knot slips so I do the improved clinch. Also if fishing barbless the dropper slips off. So I leave a long tag and attach the top fly to and the dropper to the bottom.
What size tippit do you use
depends on the exact fly
i saw a video a while back (i forget if it was here or at gink & gasoline) where they showed tying a clinch knot like this for the lead fly and i’ve been doing it like this both front and rear ever since