Winter maintenance.
During winter, when water temperatures drop, koi enter a state of reduced activity and require a peaceful environment. It’s crucial to maintain an open area in the ice to allow for gas exchange, which is vital for the health of the koi. Using a commercial ice preventer or gently introducing warm water are effective methods to create this opening. It’s important to avoid breaking the ice by force, as the resulting vibrations can be very stressful and harmful to koi.
You can think about heating the pond water. But realize that the cost to do that is a factor to consider.
