r/Koi 5d ago

HELP - sick or injured koi Question

What could this be? Burn/stress from water possibly? Old damage from birds? Something else? Koi is roughly 2 no other fish have said issue from what I can see.

19 Upvotes

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2

u/Mdsune 5d ago

The sensitive ones are still a sign that something may be wrong in your system. I saw this for years until I really got my filtration dialed in. Pristine water quality is the way.

1

u/Pretend-Internet-625 4d ago

yes check the parameters

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u/Mdsune 4d ago edited 4d ago

Find yourself a Good ORP meter. This means Oxidative reaction potential. Which refers to the ability of your water to break down nasties. You want at least 250-300 if you don’t have that your filtration is inadequate. All the BS on filtration types, bog filters, chemical additives etc don’t mean squat if you can’t hit this parameter. Best filtration is an RDF, rotary drum filter to remove solids out of the water column and shower filters or
Moving bed filters to remove the biological compounds. Get this right and sit back and enjoy a healthy pond and healthy fish. Most people on these threads are only repeating what they’ve heard. I’m telling what I’ve learned . 25 years experience in pond and koi keeping BTW.

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u/AutoModerator 5d ago

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u/Lumpy_Cup3232 5d ago

Looks fine, just some extra color on the fins. Mine have that all year round. Spot on the fin here, carp pox there. It probably got more stress fom being in that net then from the color spots on the fins. Please just let your koi koi :)

2

u/jorddx 5d ago

He was surprisingly pretty calm when netting, behavior wise completely normal as of now, noticed extra spot coming in on his back the beginning of the summer worked it out to be possibly getting more color due to the food/him being young. Just started noticing his tail so wanted to check up before potentially putting the others in danger if it was something serious

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u/Lumpy_Cup3232 4d ago

Read some of the other comments but I really wouldn't worry about him. Indeed he doesn't look stressed at all in the net even. Fins all nice and spread out. What I really meant was people sometimes stress out their koi more by going after things that aren't there. Keep an eye on the way hey eats and swims. If his behavior doesn't radically change, let him do his thing is what I mean. I got some where the color comes and goes. If it's a young one, he might even turn completely white at some point still. Do an extra filter clean, check the water, but if you find all is well, let him koi :)

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u/Mdsune 4d ago

Yes exactly Lumpy but at the same time the skin should be completely white without the pink tinge that look like your eyes after a weekend bender.

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u/Lumpy_Cup3232 4d ago

That depends, koi can get sunburn for instance. On the picture, it looks like only the top part is pinkish so coukd be that. Based on the pictute, my advise would still be leave it be but keep an eye on it. Als long as it's behavior doesn't change, it's doing fine.

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u/Mdsune 5d ago

Hard to tell but I can tell you that individual koi are just that, some show stress very easily and others don’t.

1

u/jorddx 5d ago

Yeah so far everyone here said nothing to worry about, although google research says otherwise just not sure rather catch something early vs later

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u/Mdsune 5d ago

The small blood vessels under the scales/skin is definitely a sign of stress no matter what people say here. Don’t do crazy water changes or start throwing chemicals in. Work on frequent filter cleaning until you can afford better filtration.

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u/Pretend-Internet-625 4d ago

goog;e research lol

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u/jorddx 4d ago

Yes? it’s almost like when you aren’t 100% on something you do your research 🧐

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u/Pretend-Internet-625 4d ago

what ever ai google tells you. You have to question it. And then it well either stay with the comment or correct itself. Saying I apologies for the mistake. It is a complete disaster when it comes to health issues and should never be trusted

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u/jorddx 4d ago

No one said I used ai, google is also a way I ended up in this reddit asking questions but I understand thank you!

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u/Pondpros1199 4d ago

It does appear to be due to stress.

1

u/ava_reads37 4d ago

Hard to say without a clear pic, but that pattern looks more like a healed scrape than a burn, koi skin scars weird when it heals