There’s nothing like climbing out of your pond and finding one (or more!) of these little bloodsuckers 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.
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:
- Pull Out the Debris: First, use a lake rake, like The Pond Guy® Pond & Beach Rake, to remove weeds, accumulated debris, algae, decomposing plants and muck.
- 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.
- Let Your Fish Do the Work: With nowhere to hide, those leeches will become tasty meals for your fish. Most any fish that is large enough will eat leeches, but you may consider adding more aggressive leech-eating fish like bass or redear sunfish to your pond.
- 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.