Koi in low temp POND?

[BMW Rider]

Koi and gold fish will do fine right down to near freezing. They will be less active and eat less in colder water than warm, so don't worry they're ok. If they are not feeding don't add more food as this will only pollute the water and end up feeding the algae. Try a little, if they take it you can add more, if they don't go for it, skim it out again.

You can winter them in the pond, all you need to do is make sure the water stays oxygenated by keeping a bit of open water. Little or no feeding is needed. I have to bring my pond fish indoors because my pond is not deep enough not to freeze to the bottom. The water depth needs to be below the frost line, usually at least four feet of water is needed.