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 How to do a skin scrape

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DAVID

DAVID

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PostSubject: How to do a skin scrape   How to do a skin scrape Icon_minitimeTue Sep 01, 2009 10:58 am

I have a pond 5000 l with 5 koi in it ranging from 35 cm to 60 cm.
one koi the chagoi 60 cm jumps out the water a lot and the other koi do
not. What causes him to jump and how can i stop him. His nose is bruised from hitting the net all the time. Any advice please.
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PostSubject: Re: How to do a skin scrape   How to do a skin scrape Icon_minitimeTue Sep 01, 2009 12:08 pm

Hi David

It can be lack of oxygen, but unlikely because it is still winter.

It can be water conditions. To much Ammonia or Nitrites, but then the other fish will also show signs of stress.

It can be just for fun. I found that my Chagoi's in general jump more than most varieties, although are extremely tame. You can't do anything about it, except for covering the pond with a net which you have done.

It can be due to spawning, however, it is a bit early for that. If it was a few weeks later, then I would say it is possible.

The most likely reason for jumping is parasites. The temperature fluctuates quite a lot now, and Trichodenia and White spot is starting to get quite active due to the increase and fluctuating temperatures.

Test your water for Ammonia and Nitites, and if it is fine, do scrapings to see if you have parasites.

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PostSubject: Re: How to do a skin scrape   How to do a skin scrape Icon_minitimeTue Sep 01, 2009 12:27 pm

can you give me more info on how to do the scraping
I do not have a micrscope.
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PostSubject: Re: How to do a skin scrape   How to do a skin scrape Icon_minitimeTue Sep 01, 2009 1:40 pm

No koi keeper should be without a microscope, so maybe it is time to invest in one. They are not expensive.

How to take the scrape:

Catch the koi and place it in a viewing bowl filled with pond water.
Tilt the bowl and let an assistant hold the koi firmly against the side of the bowl above the waterline. (Alternatively place it on a wet towel, hold it firmly and do the scrape. I normally cover the head with the wet towel. It helps to keep it still)
Wait until the koi settles down.
Take the microscope slide by firmly run it along the body in the direction of the scales.
Do it until you can see the mucus on the slide.
Put the fish back into the pond.
Put a drop of water on the mucus and place a cover slip on the mucus on the slide.
Examine the slide for any movement. If you find movement, compare it to the images of the various parasites found on the forum or various internet sites.
If you are not experienced or do not have an assistant, anesthesize koi before doing the scrape. See separate topic under medication.
It is advisable to take scrapes of at least two koi, and choose the ones that show signs of distress.

I often do scrapes with the minimum equipment when I am at client's ponds. On the next photo I am doing it directly from the net without taking the fish out. I found a lot of Trichodenia on this client's koi last week after he complained that his fish are jumping.

How to do a skin scrape Scrape2

How to do a skin scrape Scrape

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PostSubject: Re: How to do a skin scrape   How to do a skin scrape Icon_minitimeThu Sep 03, 2009 7:37 am

Hi Paul
What would be the right magnification microscope to buy? And where in joburg can I find one at a good price
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PostSubject: Re: How to do a skin scrape   How to do a skin scrape Icon_minitimeThu Sep 03, 2009 8:17 pm

Hi David - I have two microscopes for sale from a koi keeper who was shot in a hijacking.
I will try to find out a reasonable price.
Contact me at neaves@mweb.co.za
Regards,
Chris
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