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  1. #1

    Debris buildup after treatment for blanket weed.

    Hi,Iím new to the group but wondered if you could advise me on a reoccurring problem I seem to have. Annually around April I treat my koi pond with cloverleaf for blanket weed.I always make sure I do this before it starts to build up & make sure there is little debris present.Although it seems to stop the blanket weed I seem to get a persistent build up of black debris that blocks the filters quickly for several months afterward, am I doing something wrong?



  2. #2
    would that not be dead blanket weed?

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  4. #3
    Quote Originally Posted by Mitsufishi View Post
    would that not be dead blanket weed?
    Not sure, had nothing resembling blanket weed for about 2 months just this persistent thin black covering on the liner.

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  6. #4
    Senior Member Rank = Jussai Ajm's Avatar
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    Think fred had black algae that he had to jet wash off his pond think trace helped him out I could be wrong but worth an ask . If I remember black algae is harmful but I dont know enough to say that's what you have by any means

    Sent from my SM-N950F using Tapatalk
    Johnathan

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  8. #5
    Quote Originally Posted by Showa67 View Post
    Hi,I’m new to the group but wondered if you could advise me on a reoccurring problem I seem to have. Annually around April I treat my koi pond with cloverleaf for blanket weed.I always make sure I do this before it starts to build up & make sure there is little debris present.Although it seems to stop the blanket weed I seem to get a persistent build up of black debris that blocks the filters quickly for several months afterward, am I doing something wrong?
    hi mate I have stopped using Clover blanket weed now. I had that issue. like a oily black slime. not what AJ is on about black blanket weed. that s another story.
    so I now use Aqua resolve. and I have not had the black slime since.
    fred

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  10. #6
    Senior Member Rank = Rokusai Tom Koi's Avatar
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    Quote Originally Posted by freddyboy View Post
    hi mate I have stopped using Clover blanket weed now. I had that issue. like a oily black slime. not what AJ is on about black blanket weed. that s another story.
    so I now use Aqua resolve. and I have not had the black slime since.
    fred
    How often do you treat and how much do you use Fred?

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  12. #7
    Thank you , i will give the aqua resolve a try next time.

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  14. #8
    Quote Originally Posted by Tom Koi View Post
    How often do you treat and how much do you use Fred?
    Hi tom i treat half dose of my pond
    Every end of spring. And if real bad.
    Like last year.
    Then again about end of august.
    I never let it go beyond the fuzz stage.
    This year i had half a tub of clover leaf. Left over. So put that in.
    And ended up with the black oily slime mate.

    Sent from my SM-G925F using Tapatalk

  15. #9
    Clover Leaf blanket answer is nasty stuff, I used it a few years back and it was far too aggressive. Last couple of years if required I have used blanket weed resolve - much better stuff I think. First time I used it it turned the water cloudy for a day or two then cleared, next time I used it the water stayed clear same as other times I used it and that was all at full strength.

    From memory the frequency is once every 10 days for a month then once a month to keep on top of it. I found it cleared the blanket weed on the first or second dose and was advised to stop if it had cleared the blanket weed. I never needed the follow up monthly doses and the following year just one dose done the trick for me

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  17. #10
    Senior Member Rank = Rokusai Tom Koi's Avatar
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    Quote Originally Posted by freddyboy View Post
    Hi tom i treat half dose of my pond
    Every end of spring. And if real bad.
    Like last year.
    Then again about end of august.
    I never let it go beyond the fuzz stage.
    This year i had half a tub of clover leaf. Left over. So put that in.
    And ended up with the black oily slime mate.

    Sent from my SM-G925F using Tapatalk
    Oh , the more I hear about living with Koi and their ponds

    Latest I've heard is the time plastic media like K1 takes to mature, I feel like screaming

    Had some sleepless nights over this pond and its not even flipping started yet!!!
    Last edited by Tom Koi; 21-06-2019 at 09:31 PM.

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  19. #11
    Senior Member Rank = Rokusai Handy Kenny's Avatar
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    Showa67,

    I use Supertab and dose regularly to keep the bacterial presure down in the water. I use it all through the year upping the dose in Spring/early summer. Since I have started using it I have not had blanket weed and the growth on the pond walls is minimal. Got mine from Blackburn House Koi.

    Kenny

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