In this Outdoor Recreation video tutorial you will learn how to tie a "Uni-to-Uni" knot for kayak fishing. When fishing for Tuna, you don‚Äôt need a heavy leader. You need a 30 -40 lb test as a leader. Most spools come in 25 yard roll. Take half of the roll and use it as the leader. To tie the leader to the main line, you will need the uni-to-uni knot. Tying the uni-to-uni knot is pretty simple. Lay the main line and the leader parallel to each other going in opposite directions. Loop the main line around one finger, and wrap the tag around six times. Then pull both the ends slowly and tighten them. This is one side of the uni knot. Repeat it at the other end and you have the second uni knot. Now pull both ends so that both the uni knots are together. Watch the video for the demonstration.