Hello, I live in Canada and everyone knows how cold it can be here during the winter. I was wondering if I need to bring my koi inside because it can read up to -30 degrees celcius in Canada here. Also, my pond is only about 4 feet deep and I don't think it will be enough. Also, if I have to bring the koi inside, what time would be appropriate to bring them in (before they go into hibernation mode).
Thanks.
Thanks.