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  1. #1
    Junior Member Rank = Tosai carl.borthwick@gmail.com's Avatar
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    Algae, Algae and Algae

    I have a raised Koi pond with a glass viewing window, and after a long time the water parameters are all stable and correct.

    The surfaces of the pond and in particular the glass viewing windows are covered in a green algae that I want to eradicate (I am already using a scrubber to clean the glass periodically).

    Can someone identify the specific form of algae that sticks to the glass and advise on the best chemical treatment to remove it please?


    Pump - 19,500 l/h
    Air - 15 l/m
    UVC - 40,000 l/h 110 W
    Filter - 12,500 l/h
    5054 litres / 1111 gallons

  2. #2
    Senior Member Rank = Jussai Twhitenosugar's Avatar
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    Hi

    It's blanket weed that is growing on the pond sides and glass.

    Keeping the glass clean is surprisingly easy. You don't need chemicals to keep it clean. Just a stiff swimming pool brush i.e. on a longish pole so you can reach the bottom of the glass, or an Oxo tile scrubber should do the trick. I use the latter and it keeps the glass nice and clean.

    With the glass, it's better to give it a regular scrub and keep on top of it, even if it doesn't look too bad, as once the blanket weed takes hold it requires more elbow grease to get it off.

    In terms of removing the blanket weed in the pond, most try to manually remove as much as possible, then use AquaSource Blanet weed remover. Seems to get rave reviews on here. Although I've not personally used it so don't have any first hand experience of it.

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    13,000L fibreglassed raised pond with window

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  4. #3
    Junior Member Rank = Tosai carl.borthwick@gmail.com's Avatar
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    It doesnt look like Blanketweed as it is not filamentous?

  5. #4
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    No chemical treatment will get rid of it long term.

    The pond walls will go green or brown/green and that will be permanent.

    The window will need cleaning regularly, manually.

    Not aware of any other solutions tbh, but still the green or brown/green pond walls are all part of the ecosystem and they consume nitrates/ammonia etc.

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  7. #5
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    I have the same issue and am constantly fighting blanket weed. I use a strong dose of Aquasource Resolve on a fairly regular basis which does the job with the blanket weed but if not caught quickly enough seems to take a good couple of weeks to get on top of it specially this time of year. My problem is that I'm over stocked but have enough bio capacity to handle the Ammonia and Nitrite the fish produce but haven't currently got the right type of filter that removes the Nitrate and Phosphate. When or if we move I'm going to be installing a trickle tower, a veggie filter and if possible a bakki shower to nuke the Nitrate and Phosphate etc once and for all
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

  8. #6
    Quote Originally Posted by Frimley Koi keeper View Post
    I have the same issue and am constantly fighting blanket weed. I use a strong dose of Aquasource Resolve on a fairly regular basis which does the job with the blanket weed but if not caught quickly enough seems to take a good couple of weeks to get on top of it specially this time of year. My problem is that I'm over stocked but have enough bio capacity to handle the Ammonia and Nitrite the fish produce but haven't currently got the right type of filter that removes the Nitrate and Phosphate. When or if we move I'm going to be installing a trickle tower, a veggie filter and if possible a bakki shower to nuke the Nitrate and Phosphate etc once and for all
    Ditto to everything you said there frim one thing that I think has helped me is a have a large garden umbrella above the pond now and Iím sure itís helping! Like you though I use the resolve! But more recently I have been over dosing it! As I was battling it! So started going in more heavy on the amount and it helped for sure! Hope ya well mate!


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  10. #7
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    I now know when the blanket weed is taking over or nearly gone without even looking at the sides of the pond as I have a 3500 lph pump feeding a small veggie filter and when that's running fully unrestricted the water is coming out of the spur of the outlet T and also straight out of the end of it plus the veggie filter water level is right up to the top of the outlet pipe. When it's starting to take over the water only comes out of the spur of the T and the water level in the veggie filter drops.

    All very technical stuff you know

    Doing OK thanks, yourself, Charco?
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

  11. #8
    Senior Member Rank = Grand Champion samp09's Avatar
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    One thing worth remembering with resolve is that it is active for around 10 days, and I have found that it doesn't start to work properly for the first 2-3 days then you start to see more and more loose blanketweed. I was still getting loose strands of blanket weed in the pond last week and I put the resolve in on the 15th of June, now its more or less all gone apart from a thin layer on the walls.

    I would do a water change then add the resolve and not do a change for 10 days to get the best results personally, probably turn off trickle in/out too.

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  13. #9
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    That's similar to what I've noticed. Nothing for a couple of days and then it's nearly all gone in another 2 or 3 days and other times the results are almost over night then it can be very little for the first 7 to 10 days so another dose is used then a few days later it all starts to die off. Mine seems to work in stages sometimes as you can see the blanket weed has died off on the walls from the surface to about 12 to 18 inches down and then the blanket weed looks relatively untouched. The next dose takes it down a bit more and that's why I've had to redo the initial 1 dose every 7 to 10 days for a month a few times a year and not just the 1 off monthly dose.
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    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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  15. #10
    Senior Member Rank = Grand Champion samp09's Avatar
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    Yeah sounds exactly like how it works for me. I have used half doses in the past and they worked a treat and then the next time it done nothing. Also the same with the top section dying off then about 2ft down being thick still, that happened this time I treated but I didn't add any more and it continued all the way down and onto the floor so it is sorted now.

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  17. #11
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    The first time I used the stuff the first dose made a difference then the next dose took out more and by the time I was going to put the 3rd dose in it was all gone. The rest of the year I never had an issue and the following year no blanket weed at all. The year after that it wouldn't even touch it and the same the following year. Then after that it seemed to work again but required full strength monthly doses. I think this year I started with the extra strong doses but they only seem to work for a maximum of 3 weeks and then I tried the 7 to 10 day extra strong doses which seem to work in stages. I've even had to dose over the winter the last year or two!!!
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

  18. #12
    Quote Originally Posted by carl.borthwick@gmail.com View Post
    It doesnt look like Blanketweed as it is not filamentous?
    I’m with you Carl, on the pond walls I have a close cropped lawn, but don’t have it on the windows, just green windows, the type you get in a bottle with water left in the sunlight, the wife gets it in the drinking bowls of her giant rabbits, not blanket weed. Also use the OXO scrubber after I’ve first gone over with a 4” scraper blade.

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  20. #13
    Quote Originally Posted by Frimley Koi keeper View Post
    I now know when the blanket weed is taking over or nearly gone without even looking at the sides of the pond as I have a 3500 lph pump feeding a small veggie filter and when that's running fully unrestricted the water is coming out of the spur of the outlet T and also straight out of the end of it plus the veggie filter water level is right up to the top of the outlet pipe. When it's starting to take over the water only comes out of the spur of the T and the water level in the veggie filter drops.

    All very technical stuff you know

    Doing OK thanks, yourself, Charco?
    Sorry frim mate only just see ya response on this. Yeah mate I honestly feel the blanket weed and algae is more of a pain then anything else on pond!


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  22. #14
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Quote Originally Posted by charco123 View Post
    Sorry frim mate only just see ya response on this. Yeah mate I honestly feel the blanket weed and algae is more of a pain then anything else on pond!


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    No problem, been a bit busy recently myself just shame it was with work

    Looks like another dose of Aquasource Resolve is immanent but in these temperatures I think I'll hold off until the weekend.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

  23. #15
    Quote Originally Posted by Frimley Koi keeper View Post
    No problem, been a bit busy recently myself just shame it was with work

    Looks like another dose of Aquasource Resolve is immanent but in these temperatures I think I'll hold off until the weekend.
    Lol I just bought a 2kg tub today!


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