View Full Version : Leeches in Pond

09-24-2005, 5:15 AM
Has anybody experienced leeches in their pond? How were you able to get rid of them? Thanks :)

09-24-2005, 5:26 AM
Try and add salt !

I'm not too sure like but salt seems to be the best line of defence against most problems!

09-24-2005, 1:26 PM
I had them show up in a small diano breeding pond, they were around three quarter inches long, I put a 6" wide band of table salt around it and treated the water as for ick, the leeches crawled out and shriveled up on the salt border, it also stopped slugs from getting to my water hyacinth. Some leeches are more salt tolerant than others and some fish are sensitive to it. There are a couple products available to kill the leeches but they kill all the inverts so I have never used them. What kind of fish and pond do you keep?

09-24-2005, 5:38 PM
Thanks guys. I wll try salt. The pond has plants though!

It is a growout pond for my Plecos which has a RTG and a Rainbow shark.

Guppy, what meds are anti leeches?

09-24-2005, 7:34 PM
The meds for pond treatment of leeches are mainly malathion which is an organophosphate long term poison and very dangerous (I strongly Recomend you do NOT use this), potassium permanganate solution, and 2 commercial products that I see recomended but have never used, Ludex anti-leech, and Anchors Away, I don't really know anything about them.
Potassium permanganate is the old anti-fluke standby and is sold in pharmacies, some garden shops,, and lfs. I takes four days to treat your pond. A lot of koi supply houses carry it. the way you use it reguires that you accurately measure how much water you have and it is better to under dose than overdose or it can burn the gills of you fish. At treatment doses it will kill all your inverts but you will no longer have fish lice, flukes, or leeches. I did a quick check and you can get a 1 pound jar for $14.50 at www.fancykoiqutlet.com which will last a long time.
To use you turn off your filter and add one level TEASPOON of granules per 1000 gallons of water to your pond, dissolve it in a bucket with some water first, then stir it around, your pond will turn blue or purple then over the next couple hours turn amber or brown, once it does add 1 pint of 3% hydrogen peroxide to the pond. Stir it around and wait 3-4 hours then turn the pumps back on.
Repeat this everyday for four to five days, each day it will take longer for the blue to go away. Make sure you neutralize the potassium permanganate each day. after the last treatment do a 30-50% water change.
I helped do this with a couple koi ponds back in the mid 80's for flukes and planaria. the koi were fine.

09-25-2005, 6:11 PM
Nice info guppy. Thanks. I have tried salt first. If it does not work, I will use potassium permanganate

09-25-2005, 7:45 PM
On adding the hydrogen peroxide to neutralize the P.permanganate it should read 1 pint per 1000 gallons.

09-26-2005, 5:58 PM
ok thanks :)

09-28-2005, 11:24 PM
So, how are the leeches?

10-01-2005, 5:46 AM
0.3% salt solution did not help. :(

will try potassium permanganate this week

10-12-2005, 1:27 AM
catch it and feed it to ur fish. i have turtle so if they live a week without getting eaten they're lucky. they've never hurt my pond or fish tanks.

10-30-2005, 1:36 PM
what are leeches; i know what they are but are they someknid of insect's larvae stage or something like that?
why do ponds get leeches, where do they come from?

10-31-2005, 1:07 AM
Leeches are a type of annelid worm like earthworms but they feed on blood, there are tiny ones that only reach an 1/8th of an inch long and big ones over a foot long, they can get into your pond on the feet of water birds, or by just crawling there, they have no problem traveling around in wet grass.

12-13-2005, 10:52 PM
Amen GUPPY. Most peeps don't relise how potent hydrogen peroxide can be. One other thing to consider. Uv light(sunlight) breaks down h2o2 very quickly. This renders a quick oxygen rush to the water. If you want it to react on somthing else, maybe apply it close to dark to preserve the h2o2 from the uv reaction.
Another method suggested by the Schoharie County Soil and Water (Conservation District News) is the 'Leech trap.'

Start with a coffee can with a plastic lid
Poke holes in the sides of the can with a nail. Holes should be 1/8 to 1/4 inch in size. The nail holes should leave a sharp burr on the inside of the can (approximately 50 holes).
Put about 1/4 cup of raw meat in the can (ground beef, liver, chicken or turkey giblets are recommended).
Put the lid on the can and submerge it completely in your pond. A rock placed on top of the can will prevent it from falling over and will help prevent snapping turtles from tampering with it.
Check the trap a couple of times a week and remove the leeches. Keep the trap in the pond until the leech numbers decrease, or you no longer catch any leeches in the trap.

07-27-2010, 1:14 PM
Hey I know this thread is super old, however I need help!!

I went to clean my pond filter tonight and was surprised by in the region on 5000+ tiny leeches and what looks like bloodworm also!!

I need help on how to get rid, i have been cleaning filter for about 3 hours trying to get rid!!

Are they harmful? I have about 20 goldfish/comets and 2 yellow belly sliders.

Also live in the UK so unsure if the temps change the kind of leechs??

Help please!

07-27-2010, 1:29 PM
I think those are planaria. They live under rocks and in filters in ponds. They are harmless. http://donasdocirco.files.wordpress.com/2009/01/planaria.jpg