The blood knot is one of those fishing knots that many anglers struggle with, and over the years we’ve published videos to help. (Perhaps most popular has been the toothpick method.) Here, my fried Ross Purnell–editor of Fly Fisherman–demonstrates a “speed” version that solves the problem of controlling the tag ends. As he notes, this isn’t a “true” blood knot because the tag ends go through the central loop in the same direction, rather than in opposite directions. But I know few people who fish as often and as hard as Ross, and if he says the knot doesn’t fail, I believe him. So give it a try.
Warning: this video looks like it was shot on a potato, but it’s easy to follow.