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After getting out of my swimming pond, I had a leech on my leg! How do I remove leeches from my pond? | Ponds & Lakes Q&A


Q: After getting out of my swimming pond, I had a leech on my leg! How do I remove leeches from my pond?

Q: After getting out of my swimming pond, I had a leech on my leg! How do I remove leeches from my pond?

Dennis – Blythewood, SC

A: There’s nothing like climbing out of your pond and finding one (or more!) of these little blood suckers stuck to your leg. What are they, and how do you banish them from your pond?

Getting to Know Leeches

Leeches are 2-inch-long brownish-black segmented worms that are a distant cousin to the earthworm. They use their suction cup-like mouths and teeth to latch on to vertebrate and invertebrate animals, feeding on their blood. Of the 700 different leech species, the majority live in freshwater environments, like your swimming pond.

Leeches love to live in the debris at the bottom of your pond. In all that muck accumulation, they get comfortable, find food and hide from predators—also known as fish—swimming overhead.

Despite their bad reputation, leeches aren’t all bad. Up until the 18th and 19th centuries, these worms had been used medicinally on humans to improve and restore blood circulation. The practice waned for a time—likely a combination of the yuck factor and modern medicine—but it’s slowing coming back into favor.

Kicking Leeches to the Curb

Unless you practice leech therapy, you probably want to evict those invertebrates from your pond. The best way to do that is to remove their preferred habitat—all the muck and debris covering the bottom of your pond. How do you do that? Here’s a four-step approach:

  1. Pull Out the Debris: First, use a rake or cutter to remove weeds, accumulated debris, algae, decomposing plants and muck.
  2. Add Beneficial Bacteria: Next, add some beneficial bacteria, like those found in MuckAway™. The bacteria will head to the bottom of the pond and digest whatever muck remains. Remember that it will take some time to break down all that debris, so be patient.
  3. Let Your Fish Do the Work: With nowhere to hide, those leeches will become tasty meals for your fish. You may even consider adding some more leech-eating fish to your pond.
  4. Trap and Destroy: For those leeches that elude your finned friends, you can trap and remove them with a baited trap. Punch leech-size holes in a coffee or aluminum can, bait it with raw chicken or fish heads, and position it in a shallow area of your pond. When the worms go for the grub, they can get in but not out because the burrs from the hole punches will prevent them from escaping. Remove the can once it’s full and repeat until the leeches are gone.

If a leech latches onto you, don’t worry. In most cases, it won’t do any harm. In fact, you might not even feel it as the tiny critter injects the spot with anesthetic-anticoagulant combo while attaching itself with its suckers. You can remove a leech by breaking its suction seal with your fingernail or another blunt object, causing the worm to detach its jaws.

Pond Talk: Do you have any leech-removal tips to share?

Cut Through Tough Pond Weeds - The Pond Guy® 28 Inch Weed Cutter

3 Responses

  1. You don’t “rip the leach off”. Push sideways slowly and steadily on the small end (it’s mouth) with your fingernail or a credit card. Once you’ve pushed enough, you will break the suction and it will detach. It will generally try to re-attach, so flick it off once it is detached.

  2. Having observed leech therapy on post-surgical patients, when the leech fills with blood, it will drop off. This is safer than possibly leaving parts of the leech in the wound by ripping it off. I have never tried this but would sprinkling salt on the leech cause it to drop off sooner?

    • Hi Irene – There are studies that suggest using salt will cause the leech to fall off sooner, however, there is also concern of the leech releasing blood/fluids back into the wound before actually letting go. It is generally recommended to either break the suction or allow the leech to fall off on its own.

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