That leaves 16 for the fish to lounge around and basically hibernate over the winter.
Outdoor koi pond in winter.
It doesn t matter how deep the pond is it just matters that the water is moving and not frozen.
Non hardy plant specimens such as tropical water lilies can be moved out of the backyard pond in winter and into a greenhouse or under artificial lights for 12 to 18 hours with a water temp of around 70 f.
They spend most of their time treading water at the bottom of the pond while sometimes swimming around a bit.
Goldfish and koi are very hardy fishes.
If you simply make sure that your pond is at least two feet deep the proximity of the earth to the pond s surface will not allow the latter to freeze any deeper than 8.
They don t sit completely still all winter they need a little movement to keep their joints from seizing up.
In the wintertime when the water in your pond is ice cold the koi fish s metabolism slows down to a crawl.
Overwintering tender garden pond plants may occur in several ways.
To help ensure healthy fish in the spring follow these steps.
The basic principle for winter pond care is as long as the water is circulating and there is an air hole to allow oxygen in and gases out fish and plants should be fine.