Tom Rowland | Triple Surgeon vs Blood Knot - Which Wins for Fly Fishing? | Ep. 662

When it comes to connecting fly line to leader or tying two pieces of monofilament together, anglers have debated knot choices for decades. The triple surgeon's knot and the blood knot represent two fundamentally different approaches to the same problem, each with distinct advantages that can make or break your connection on the water. In this How 2 Tuesday episode, Tom Rowland settles the debate by breaking down exactly when to use each knot, why the triple surgeon's might be the better choice for most fly fishing applications, and the critical technique adjustments that determine whether your knot holds or fails under pressure.

Why the Triple Surgeon's Might Win for Fly Fishing

Tom opens this knot comparison by acknowledging what many fly anglers already suspect: the blood knot has a reputation as the "superior" connection, but that reputation may not tell the whole story. The triple surgeon's knot offers a compelling combination of speed, simplicity, and strength that makes it particularly valuable when you're building tapered leaders or making repairs on the water. Tom explains that while the blood knot creates a streamlined connection that passes through rod guides smoothly, the triple surgeon's excels when you're joining materials of significantly different diameters—a common scenario in fly fishing leader construction. The technique differences between these two knots reveal why one might serve you better depending on your specific application. Tom breaks down the triple surgeon's technique starting at the opening of the episode.

The Blood Knot's Aesthetic Advantage

There's something undeniably elegant about a properly tied blood knot—the way it creates a slim, straight-line connection that seems to disappear into the leader material itself. Tom discusses why this knot has earned its place in fly fishing tradition and where it genuinely outperforms alternatives. The blood knot's low profile makes it ideal for connections that need to pass through rod guides repeatedly, such as when you're using running line systems or creating permanent leader setups. However, Tom reveals a critical limitation that many anglers discover the hard way: when you're trying to connect lines with significant diameter differences, the blood knot's wrapping technique becomes increasingly difficult to execute properly, and the resulting connection may not achieve optimal strength. The detailed blood knot analysis and when to use it begins early in the episode.

The Critical Technique Detail Most Anglers Miss

Tom emphasizes a technical detail that separates knots that hold from those that fail: you must pull the knot tight in stages, and you must wet the knot before final tightening. With the triple surgeon's specifically, Tom explains the importance of making sure each of those three wraps seats properly as you gradually increase tension. This isn't just about lubrication to prevent friction damage—it's about allowing the knot structure to form correctly so that when you apply final pressure, everything cinches down into the optimal configuration. Many anglers rush this step or skip the wetting entirely, then wonder why their knots slip under heavy loads. Tom walks through the proper sequence for tightening both the triple surgeon's and the blood knot, explaining how the mechanics differ between them. The complete knot-tying technique with all the critical details is demonstrated throughout the episode.

When Each Knot Actually Wins

Rather than declaring an absolute winner, Tom provides the practical guidance that matters most: knowing which situations call for which knot. For building tapered leaders where you're connecting 30-pound butt section to 20-pound midsection to 12-pound tippet, the triple surgeon's handles those diameter transitions more reliably and ties faster when you're doing multiple connections. For creating a permanent connection between two sections of similar-diameter material—especially when that connection needs to pass through guides repeatedly—the blood knot's slim profile offers real advantages. Tom also addresses the reality that in windy conditions on a boat deck or when your hands are cold, the triple surgeon's forgives technique variations better than the blood knot's more finicky wrapping sequence. The best anglers keep both knots in their skillset and choose based on the specific scenario they're facing. Tom's final recommendations and when to use each knot are covered at the end of the episode.

Final Thoughts from Tom

I've tied thousands of both these knots over the years, and I'm still amazed at how many experienced anglers haven't really tested them side by side. The blood knot has this reputation as the "proper" knot, the one serious fly fishermen are supposed to use, but that reputation sometimes gets in the way of practical evaluation.

What I want you to take away from this episode is that knot selection isn't about tradition or what looks most elegant—it's about matching the tool to the job. When I'm building leaders with significant taper, I reach for the triple surgeon's every single time because it just works better for that application. When I need a slim connection that's going to pass through guides all day, the blood knot earns its place.

The real skill is knowing which knot serves you best in each situation and then executing it properly. Watch the full demonstration, practice both knots until they're automatic, and you'll have the confidence to build any leader system you need on the water.