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  1. #1
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    Exclamation Duckweed Aaaaaaargh!

    A piece of this triffid like stuff from hell found it's way into my HUGE Koi pond. I've tried starving the fish but they still turn their noses up at it. Ducks shit everywhere. Turtles?

  2. #2
    Thailand Expat Pragmatic's Avatar
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    Try this forum.

  3. #3
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    Angry

    Quote Originally Posted by Pragmatic View Post
    Try this forum.
    Thanks for this. Reading the posts it looks as though my Koi are rare in that they won't touch the stuff, and they're upwards of a foot long, so not 'too small to eat'. I don't get it :/ The thread is old but if the members missing their duckweed want some more, I could ask them round to take the damned stuff away. But it would only take just one piece for it to be back again. I once completely emptied a small fish bowl, scrubbed it thoroughly, refilled it and put tiddlers back, and bugger me it was all back within a week! I'll keep the feeding down to once per day and try to procure some turtles, as it was mentioned they like it. Allegedly. Thanks again

  4. #4
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    Maybe a few crocs would do it...

  5. #5
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    Try spraying weed killer, roundup might do the trick, make sure you film it and share it on YouTube to help others of course.

  6. #6
    Thailand Expat David48atTD's Avatar
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    The Thai Family are fish (and Prawn/Shrimp) Farmers in Thailand.

    We'd LOVE a pond of duckweed ... but we don't raise Koi.

    Maybe the introduction of a few fish, (mono-sex is best so you don't get a growing population) which will eat the duck-weed.

    I'm not so sure about spraying glyphosate (roundup) or another herbicide.

    There is some research about it on the net though.


    When we want to skim the surface of the pond, we usually use this scoop as below ...

    Last edited by David48atTD; 18-09-2017 at 03:52 PM. Reason: Added the YouTube

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  7. #7
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    Read the label carefully on the Roundup can. It may be poisonous to aquatic life.

  8. #8
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    Smile

    Quote Originally Posted by David48atTD View Post
    The Thai Family are fish (and Prawn/Shrimp) Farmers in Thailand.

    We'd LOVE a pond of duckweed ... but we don't raise Koi.

    Maybe the introduction of a few fish, (mono-sex is best so you don't get a growing population) which will eat the duck-weed.

    I'm not so sure about spraying glyphosate (roundup) or another herbicide.

    There is some research about it on the net though.


    When we want to skim the surface of the pond, we usually use this scoop as below ...

    I think the poster suggesting the poison that is Roundup was having a little joke. This stuff is made by Monsanto and therefore has 'protected status', I'd rather use my own teeth to pull out weeds rather than use any herbicide, particularly this one.

    I have fifteen large Koi, biggest is two plus and growing, and the usual nok yung things plus some delightful little red PAD's, so don't want to introduce anything more as will pollute pond. Nah. Will try turtles. They have a voracious appetite and shouldn't be too much of a problem, given the size of the pond. Thanks anyhoo.

  9. #9
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    I feed it to my chickens it a high protein food which in it's dried form can be up to 60% protein. Can save about 25% on chicken food bills

  10. #10
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    Does the Koi pond have any kind of filtering. You could try a surface suction inlet to vacuum it all away.

  11. #11
    Days Work Done! Norton's Avatar
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    Quote Originally Posted by tamsin View Post
    Will try turtles
    They love the stuff. I have a large turtle and he goes out of his way to feast on duckweed.

  12. #12
    Days Work Done! Norton's Avatar
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    Yellow necked temple turtle is what I have. No appitite for koi as far as I know.


  13. #13
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    I have learned here about Duckweed, so I brought a bit to my Koi pool and Bingo, they eat it.
    Although not so hungryly as the regular dry food fed every morning, however, throughout the day they had finished a handful of it.

    Attached Images Attached Images

  14. #14
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    Quote Originally Posted by VocalNeal View Post
    Does the Koi pond have any kind of filtering. You could try a surface suction inlet to vacuum it all away.
    A simple DIY filtering:



    The dirty water flows slowly into the vortex (blue plastic barrel). From there on to next few chambers with overflow and some kind of filtering material, up to the last section from where it is sucked off by a small pump 0.3 HP (when the level switch is at high level) back to the pool.

    The pressure vessel sand filter - shown on left hand side - (good for backwashing) can be omitted, then pumping the water from the last section directly into the pool.

    The bottom dirt outlet from the pool I had later changed from the center to the side in order to have the pipe to the vortex going more straight. And accessible for pushing a steel string when cleaning.





    Attached Images Attached Images

  15. #15
    Days Work Done! Norton's Avatar
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    Looks good.

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