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  1. #1

    Can anyone ID this for me?

    I found one of my koi jumping out of the pond like crazy so took a scrape and found this, however finding it really hard to get a focus on them.

    https://youtu.be/B873E78OXCo

    Also

    https://youtube.com/shorts/oGXPFj5OLOM?feature=share

    Scraped 2 other fish and couldn't find anything on them.

    Thanks.

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  2. #2
    Looking at other videos it looks like Costia? Would you agree?

    I guess I need to get some PP

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  3. #3
    Senior Member Rank = Jussai g mac's Avatar
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    I'm finding it difficult to see what's what on those videos. I'm not seeing Costia. but maybe white spot or chillo
    7500 litres
    Filtreau combi with uv.
    Some koi

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  5. #4
    Yes not the best, sorry. This was as 400x where as when zoomed out there seem to be millions of them in clusters moving rapidly. However as time moves on they tend to slow down and stop. Maybe dieing because they are not on the fish anymore, don't know. I just can't seem to get a sharp focus on the scope.

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  6. #5
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Almost certainly Costia right at the beginning of the first video.

    You also have those things that look like Trichodina that I was recently flummoxed by when finding on scrapes. (The circles that aren't moving), no idea what they are but suspect they are not parasites.

    I've also had what you have in the second video. I would guess you're using the x40 objective through the Minigrab and by the time it hits your screen it is hugely magnified even further. I suspect they are just cells bouncing around. (Obviously could be wrong).

    Think carefully about how you are going to treat - I've used PP for Costia before and it didn't work, so I did it again, didn't work, then (NT Labs) FMG didn't work either, by that time the fish had seriously had enough of treatments but the Costia were still there. Then I used Alparex and it got rid of the Costia very rapidly but by then the Koi were really stressed, covered in Mucus and clamped and bottom sitting. That was a Month of Koi Keeping I'd rather forget!
    Last edited by RS2OOO; 06-07-2022 at 09:48 AM.

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  8. #6
    Senior Member Rank = Jussai g mac's Avatar
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    Quote Originally Posted by Cavester View Post
    Yes not the best, sorry. This was as 400x where as when zoomed out there seem to be millions of them in clusters moving rapidly. However as time moves on they tend to slow down and stop. Maybe dieing because they are not on the fish anymore, don't know. I just can't seem to get a sharp focus on the scope.

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    I couldn't see that but yes, if millions moving about and looking like little commas, then I would have gone with Costia.
    7500 litres
    Filtreau combi with uv.
    Some koi

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  10. #7
    Senior Member Rank = Jussai g mac's Avatar
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    Like RS, I found Alparex sorted costia
    7500 litres
    Filtreau combi with uv.
    Some koi

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  12. #8
    Thanks, I'll grab some. Strange that Alporex doesn't mention Costia as something it combats against?

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  13. #9
    Senior Member Rank = Jussai g mac's Avatar
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    Quote Originally Posted by Cavester View Post
    Thanks, I'll grab some. Strange that Alporex doesn't mention Costia as something it combats against?

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    Worth having a chat with Gaz from Aurora Koi. I'm sure he will advise you
    7500 litres
    Filtreau combi with uv.
    Some koi

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  15. #10
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Alparex definitely works on Costia, and works well, but before ordering it you must make sure you have a KH of 5 or more as it is quite acidic.

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  17. #11
    So on my second day of Alparex. Something's definitely happening (hopefully) because the fish don't look happy at all. While the pond has gone completely luminous green the fish are all huddles together down on the bottom of the pond hardly moving.

    How long does it normally take for the water to clear?

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  18. #12
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    It can take 1 to 2 weeks to clear. Seems to take different lengths of time in different water.

    What was your KH reading prior to administering?

    What is your KH and pH reading now?

    Do you have plenty of oxygen going in, especially in view of the recent heat?

    I notice your above post was a number of days ago, how are the Koi now?

  19. #13
    Unfortunately I am on holiday now and the father in-law keeps going down daily to check and finding dead fish. Unfortunately I fear that by the time I get back I will have no fish left. It's too hard to explain to the farther in-law how to test and what to do so I'm knackered. There are 2 others dead not shown here so 9 in total so far.

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  20. #14
    Senior Member Rank = Grand Champion samp09's Avatar
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    Sorry to see this mate, another victim of the Alparex issues it seems. How long are you away for? Can he not do a water change etc?

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  22. #15
    Away another week. I'll try to instruct him how to do a water change today if I have any fish left. My two big ones are still alive as of last night I believe.

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  23. #16
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    This is horrible to see, especially as it seemed you were doing everything right.

    And even worse when you are helpless to take immediate action.

    What was the pH and KH before you treated?

    When you are home do another test to see if the levels recorded have changed.

    I wonder if there are any members local to you that could go round and take a look?

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  25. #17
    Thanks. Managed to get the farther in law to do a PH test and it's 8 so not that. Also done a chlorine test and that was clear. Can only be the Alporex. No new fatalities today.

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  26. #18
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by Cavester View Post
    Thanks. Managed to get the farther in law to do a PH test and it's 8 so not that. Also done a chlorine test and that was clear. Can only be the Alporex. No new fatalities today.

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    What was the KH level before treatment?

    Is your father in law able to do a KH test?

    I was talking to a Dealer recently about Alparex and the issues that pop up surrounding it now and again, and he was baffled, said it would be a gross underestimate if he said he'd used Alparex 300 times, and never had a problem.

    I used it a couple of times with great success, but admittedly the last time I used it I had 2 koi that struggled with what appeared to be gill damage as they became very sensitive to low oxygen levels. It took them many weeks to fully recover and one of them remains as the "canary" for low dissolved oxygen. I couldn't honestly say if Alparex was the cause as I'd used a couple of different treatments that had failed before reaching for the Alparex. It certainly sorted the Costia problem mind.

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  28. #19
    Senior Member Rank = Grand Champion samp09's Avatar
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    It is strange, I know queni use it on the newly imported fish, and keepers koi will use it a couple of times as he says all imported fish from Japan are crawling in parasites when they arrive and never had an issue. There must be something causing it the issues people have but it seems impossible to find out.

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  30. #20
    So I'm back from holiday to another 3 fish dead, so 9 in total, one was one of my big ones .

    I have just done all the water tests and kh 6, PH 8.5, ammonia 0.5 (but was previously 0 and increase will be from deaths) and nitrite 0.

    I'm now doing a 50% emergency water change as the water is still really green. I was talking to a koi dealer on the phone and he said Alporex was good stuff but it's a nightmare to get out your pond.

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