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  • Results 1 to 9 of 9

    Thread: Several white dots on koi's tail fin

    1. #1
      William46 is offline Junior Member
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      Several white dots on koi's tail fin

      Hello all,

      First of all I would like to thank everybody for the support given to everybody that find themselves with a sick koi.
      I often read as much as I can and I want to give a thumbs up for the community that really can save a koi's life (and a sad time for the owner)

      It seems that after winter, spring brought some issues to my koi.
      During the last couple weeks, I can see that during feeding, most of the koi flash and some of them jump (although not always).
      I checked my water parameters and they seem fine.

      But I think the problem comes from another direction. A couple days ago I spotted a couple dots on my chagoi, all of them on the left pectoral fin.
      A few days later, I saw one of my sanke with a white dot near the tip of the pectoral fin.

      This afternoon I was able to spot several white dots on the ki utsuri's tail fin and additionally, the chagoi has now a few more dots, this time on the dorsal fin.


      After a more closeup look at the utsuri, I saw another white dot on the gill cover and another one (which looks more squarish) at the edge of the gill plate.

      I am not sure if this is some sort of parasite, or a virus.

      It is interesting though, that I spotted what seemed to be one of these spots like dividing itself, could this be that the parasite is multiplying itself?

      Hope somebody can know what could be the issue with my koi.

      Here are two photos that shows better the problem:




      Thank you very much everybody for your help and support

      Best wishes,
      Guillem

    2. #2
      cindy's Avatar
      cindy is offline WWKC Vice President
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      Sorry for the delay.

      Just looks like viral koi pox. Warm water dissolves.

      Concerned about the jumping. Have you added any new fish, last water change and give me your test numbers.

      Take a cotton swab with a little peroxide and dab the spot. Feel and see if it feels waxy
      My opinions in ER and on this forum are mine only. Use my advice at your own discretion.

      "Our goal is to assist with emergency and Koi health issues, as well as educate on best practices. Please help us gain a clear picture by giving the original poster time to answer our questions before offering opinions and suggested treatments."


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    3. #3
      William46 is offline Junior Member
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      Quote Originally Posted by cindy View Post
      Sorry for the delay.

      Just looks like viral koi pox. Warm water dissolves.

      Concerned about the jumping. Have you added any new fish, last water change and give me your test numbers.

      Take a cotton swab with a little peroxide and dab the spot. Feel and see if it feels waxy
      Hello Cindy,

      Thank you very much for your reply.

      I have not added any new fish into the pond, and I do water changes often, using a product every time that according to the description removes ichthyotoxic ammonia and nitrite, binds heavy metals such as lead and copper, removes chlorine and chloramines.

      Aditionally, since temperatures warm up and fish start to eat, every two weeks I add beneficial bacteria that aids in removing nitrites.

      I did have a nitrite spike at the beginning of spring season and adding the aditional bacteria helped to keep safe levels. Perhaps the new biological filtration was not yet active but nitrites lowered since then.

      The water parameters are:

      Ammonia: 0.1
      Nitrite: 0.1
      Nitrate: 2.5
      KH: 6
      Ph: 8

      On regards the peroxide, do you refer to hydrogen peroxide (H2O2) right? Sorry about that, since my mother tongue is not English, I haven't used this word much, but I believe I know what you mean

      Thanks Cindy!

      Best wishes,
      Guillem

    4. #4
      RichToyBox's Avatar
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      Yes, H2O2. I don't know if you can get a product that is Diflubenzuron. Here it was marketed as Dimilin, now Adept, and there are other brands. It is a chiton inhibitor and at 1 gram per 1000 gallons it will kill any argulus or anchor worm. What you have could be, as Cindy pointed out pox, but it could also be encysted anchor worm larvae which I have had real good luck with the Diflubenzuron 25% wettable powder.

      "Our goal is to assist with emergency and Koi health issues, as well as educate on best practices. Please help us gain a clear picture by giving the original poster time to answer our questions before offering opinions and suggested treatments."

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    5. #5
      William46 is offline Junior Member
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      Quote Originally Posted by RichToyBox View Post
      Yes, H2O2. I don't know if you can get a product that is Diflubenzuron. Here it was marketed as Dimilin, now Adept, and there are other brands. It is a chiton inhibitor and at 1 gram per 1000 gallons it will kill any argulus or anchor worm. What you have could be, as Cindy pointed out pox, but it could also be encysted anchor worm larvae which I have had real good luck with the Diflubenzuron 25% wettable powder.
      Hello Richard,

      Thanks a lot for your reply.

      I did a Google search and I found the Diflubenzuron under the name of Dimilin - 25 here in Spain. According to the composition shown on the package, it contains Diflubenzuron 25% and the package content is 200g.

      Before I proceed with the Diflubenzuron, should I first do as Cindy said to make sure if it feels waxy, or just simply add the Diflubenzuron? The diflubenzuron is applied in the water, or with a cotton swab on these spots? My pond is 2500 liters, about 660 gal so I should apply less than a gram in the water I guess. It seems the diflubenzuron is really a very strong product.

      Thanks a lot for your help.

      Best wishes,
      Guillem

    6. #6
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      Because of the way it works, it is pretty good as for dosage levels. It prevents the formation of the shell, as in shrimp, lobster, crayfish, and most insects with hard shells. It will not affect the fish, so use something like 1 gram, unless you have a balance that will measure lower. I found it effective for parasite infestations, but viral issues just have to wait it out as they come and go.

      "Our goal is to assist with emergency and Koi health issues, as well as educate on best practices. Please help us gain a clear picture by giving the original poster time to answer our questions before offering opinions and suggested treatments."

      Zone 7 A/B
      Keep your words sweet. You never know when you may have to eat them.
      Richard

    7. #7
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      Edit, the dose is supposed to be one gram per hundred gallons, or about 1 level teaspoon per 600 gallons. Sorry. Getting old is ****

      "Our goal is to assist with emergency and Koi health issues, as well as educate on best practices. Please help us gain a clear picture by giving the original poster time to answer our questions before offering opinions and suggested treatments."

      Zone 7 A/B
      Keep your words sweet. You never know when you may have to eat them.
      Richard

    8. #8
      William46 is offline Junior Member
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      Quote Originally Posted by RichToyBox View Post
      Edit, the dose is supposed to be one gram per hundred gallons, or about 1 level teaspoon per 600 gallons. Sorry. Getting old is ****
      Thanks Richard!

      I have a microscope on the way, these last couple days I've been reading about taking a scrape as I really want to know a little bit deeper what is my koi's condition and being able to take a close look with a microscope would allow for a better understanding, since jumping and flashing may be caused by parasites, I would like to identify what's in there. From the distance, the white dots seem to get a little longer which may seem to start to take the shape of the viral pox.

      I will take some more photos once I bowl the fish to take the sample and will post them here. I have read that the frequent areas for parasites to be on a koi are under the mouth and near the gills, so I will take a sample from that area as well as the sides.

      Best wishes,
      Guillem
      Last edited by William46; 05-17-2018 at 06:04 PM. Reason: grammar correction

    9. #9
      William46 is offline Junior Member
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      Hello everybody,

      Today I finally received my microscope and I was able to do an examination on both the Chagoi and the Ki Utsuri of this very same post.

      I did find a parasite, and from what I have seen from other videos, I guess it is a skin fluke.

      Here is a video which actually I think has better quality than the images, my apologies for the poor quality of them.











      It was very intersting as this was the first time I used a microscope to try to examine the koi's slime. Last time I used a microscope was when I was a little kid, so I highly recommend to koi keepers to have a microscope in hand, it does not have to be a super high tech, but sometimes it is better to diagnose than guess so that a proper solution can be aplied

      Will try to keep the post updated on regards these parasites, it may be useful for somebody in the same situation. Today as far as I saw, these white dots on the Chagoi's fins seems more and more to be a carp pox.

      Best wishes,
      Guillem
      Last edited by William46; 05-21-2018 at 01:21 PM.

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