gofish
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Jul 17, 2008, 9:26 AM
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We have an interesting problem here at home with our koi, that no one has ever heard of. In spite of great food, great water (clean with 25% change per week), low fish load, etc in the past month some of our fish have been losing their coloring, both hi and sumi. It's been indiscriminate, hitting koi of various ages and from various breeders. What is in common with all of them is that once the fish begins to lose the coloring it goes quickly, within 1-2 weeks. The shiroji on the koi are beautiful and the koi seem to be of perfect health.
Our vet mentioned hikkui and I found an old thread from 2004 on here when I googled Hikkui. We've never had any yellowish spots or anything and slime coat appears to be good. What we do have is a fish that has been in our pond for 5 years without any issue with its coloring and has lost 80% of its coloring on its head within 1 week. Everyday you walk out to the pond, more is gone. We have a sanke that's been in our pond for less than a year that 6 weeks ago had a bright future (see attached pics) and now doesn't even look like the same fish. We have 16 fish in 12,000 US gallons. 13 have red and all 13 have been affected to some degree. One fish had red so deep, judges just couldn't believe her hi. It's disappearing. It's not just affecting the hi, it affects the sumi as well.
My question is, could this possibly be hikkui? Here in the states every advanced hobbyist we've talked to has never seen anything like it.
Thanks
Tamara
Here is the picture of the sanke end of May.
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