My koi woke this spring with the first disease (or parasite) that i have ever seen on them. It is definitely hurting their skin. I dont notice any heavy breathing so dont think it is in gill's yet if it will go there. Just on their skin. My local pond store said to treat with salt as parasites cant survive in salt but i was wondering what you all treat with. I will post pics but im sorry they are not great. I didn't want to stress the fish out more by taking them out of the pond. I though it would be easier to treat them in a quarentine pond but someone pointed out that would stress them more and i am in klind to think they are right. So i will treat the whole pond. But how? The fish on the top has the worst case in the pond. You can kind of see it on his side under the red spot. His so far is the only one raised on the skin. The others who have it is just like pail spots on their skin?