Lumps on koi

[Hammsnest]

I had one fish that developed lumps on it’s body and, now, I have two. Should I remove them from the pond. The weather is getting colder. I live in Michigan, so my pond freezes over every year. I keep a small heater in there, in order to prevent a buildup of gasses. Will these lumps spread to the rest of my fish, and will the 2 that already have them make it through the winter? I believe this is Koi Pox.

 

[Tula]

Koi Carp Pox Treatment & Prevention (5 Steps) - Pond Informer

Guide to koi carp pox treatments, recovery, and the best prevention methods. Information on carp pox in koi, and ways to reduce pox outbreaks in future.

pondinformer.com

This article gives a pretty good overview on koi pox. In the article are a few pictures, so you can see if they look similar to your fish.

 

[Nevermore44]

Any pics?

my young chagoi got the waxy lumps starting last fall... he started with just a few on his sides but the come this spring they popped up on his upper lips, fins and more on his side... got bad. He didn’t slow down a bit though... and just last week it started disappearing. He only has a few faint areas left. I hasn’t “spread” to any others at this point

 

[Lisak1]

Koi pox isn't deadly. Just unsightly. If memory serves it's basically like herpes in a human - once you have it, you have it for life and can get flare ups of symptoms during times of stress. I think the fish that get it are genetically predisposed.

 

[j.w]

@Hammsnest
Hope your fish survive.