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How to tie the Blood Knot · ReelFishHelp

Blood Knot

Joins two similar-diameter lines smoothly — classic for building tapered mono/fluoro leaders (fly and conventional).

line-to-lineIntermediateStrength 4/5monofilamentfluorocarbon

How to tie it

1Overlap the two lines. Wrap one tag around the other line 5–6 times.
2Bring that tag back to the middle gap.
3Wrap the other tag around the first line 5–6 times the opposite direction.
4Bring it back through the same middle gap (opposite side).
5Wet, pull the standing lines to draw the wraps together; trim tags.

Watch how to tie it

Common mistakes

Uneven wrap counts
Tags not passing through the center gap

When not to use it

Very different diameters — use an Albright.

Alternative knots

Surgeon's Knot Double Uni Knot

Good for these fish

Rainbow Trout Brown Trout