My koi have a sickness

[CamERER]

What sickness is this? I have treated my entire pond and moved the ones who had more symptoms to a tub which I am treating. I am doing 50% water changes on the pond every other day. I have lost 1 koi and one goldfish from this. What is it?

 

[Angellove78]

I looked this up. And looks like koi herpes virus. Check into it a little more to make sure. Cyprinid herpesvirus 3 https://g.co/kgs/zfmnFw

 

[CamERER]

I’ve done some research and I don’t think that is it. I think it may be cotton wool virus.

 

[Angellove78]

Go down to what is khv... on this site. I don't think it's cotton wool. Cotton wool if I remember right it would have to be a lot more fuzzy cotton look to the fish. https://thefishsite.com/articles/a-guide-to-koi-herpesvirus-disease-how-to-detect-treat-and-prevent

 

[Angellove78]

Oh, and goto the signs of khv on that site.

 

[CamERER]

View attachment 309129
I found this on the internet. This is what they had. That one only had a black spot on 1 side and it is part of his coloration. Other fish didn’t have any black gills either. It is mostly the white stuff hanging off of them that is noticeable and there is a lot of it all over the ones that have died. No others hav had the same symptoms yet but the ones who died happened within a couple of days.