When you learn fly fishing, one of the first tactics you will learn is nymphing with a single nymph. It’s an excellent tactic for catching fish, but while you’re getting used to it on the river, you’ll notice other anglers fishing two flies, which is called using a tandem rig.
What is a tandem rig?
Now, when you see anglers fish two flies, they are either fishing a two-fly rig consisting of two nymphs, two dry flies, or one with hopper-dropper fly combinations, which is when you fish a dry fly and a nymph. It’s very unlikely they’ll be using two streamers, but it is possible.
A tandem rig involves connecting the two flies with one piece of tippet, whereas a dropper rig involves the two flies on their own pieces of tippet.
Fly fishing with multiple flies using tandem rigs helps you catch more fish, as two flies are always better than one fly, but it doesn’t come without its challenges. Suddenly, you have a tow fly rig to control, making casting harder and the chance of tangles much more likely.
If you’re ready to start fly fishing with two fly rigs, then here is how to tie and fish a double nymph rig.
How To Tie A Double Nymphing Rig
Before we get started, let’s iron out some details. The steps below are based on tying tandem multi-fly rigs consisting of two nymphs. We will assume you’re using a 9-foot, 5-weight fly rod with a reel and a fly line with a welded loop at the end.
Step 1 – Tying your leader to your fly line
Before you tie on your leader, consider what material you will use. When fishing with nymphs, you want your leader to be able to sink, and Fluoro is best for this as mono floats.
Your leader should be around 3-4x, depending on water clarity, and 7-9ft in length. In the next steps, you’ll add the tippet and flies.
Attaching your leader to your fly line is very easy if you have a pre-made knotless leader that comes tied with a loop at the butt end. If this is the case, make a loop-to-loop connection, and you’ll be ready.
If you don’t have a pre-made loop in your leader, you can tie one at the butt end with a perfection loop knot or surgeon’s loop knot and then make the loop-loop connection between the leader and the fly line.
Step 2 – Attach a section of tippet to your leader
Now it’s time to add a tippet section to your leader. The piece of tippet should be smaller in diameter than the leader and around 1-2 ft in length. We highly recommend using fluoro tippet material as it sinks and is more invisible to fish than mono tippet material.
Attach a tippet section to your leader using or tying a blood or double uni knot. I prefer the double uni knot, but it’s up to you. Make sure to trim the tag ends, as each tag end can catch on your casting stroke, creating a tangle.
Step 3 – Selecting and tying on your point fly
Your point fly is the first or top fly you add to tandem rigs.
The point fly should always be the heavier, larger fly you’ll use. This is in line with your tapered leader, as making the top fly larger makes casting easier.
Also, if it’s heavier, it will pull both flies more profoundly into the water column near the bottom where the fish feed.
Attach your point fly, the heavier larger nymph, a size 14 Gold Head Hares Ear, to your tippet using the improved clinch knot. Again, trim the tag end tiny so the tag doesn’t catch when you’re casting.
Step 4 – Attaching the second fly
Before you can tie on your second fly (dropper fly), you’ll have to add more tippet to form the two-fly tandem rig.
You should use the same size and material of tippet as in step 2 and the same length. To do this, tie your tippet to the hook bend of the point fly using an improved clinch knot again.
This might be tricky as there is no eye to thread the line through. I used my finger and then slipped it onto the hook bend to tighten the knot. Again, trim the tag so it’s easier to cast, and make sure the knot is secure against the bend.
To finish the setup, tie your dropper fly to the end of the tippet with another improved clinch knot and trim the tag end to make it easier to cast with.
Step 5 – Add weight if you need to
To catch fish with a two-fly nymph rig setup, you need the flies to get down to where the trout are feeding. Now if you’re using weighted flies with say a tungsten head or bead head, you might have enough weight to get down to the fish.
Whether you need to add weight to your double nymph rig depends on the river you’re fishing. If the water is high and fast, adding some weight in the form of split shot or putty above the leader-to-tippet knot is a good idea.
Step 6 – Add a strike indicator
Many anglers add a striker indicator to their double nymph rig setup. It makes it much easier to notice a