The weather is 15 degrees. Can koi fish have it both ways?

Yes After learning the news of the cooling, the fish friends can carry out an insecticidal and bactericidal activity, because the severe cooling greatly reduced koi fish's immunity. 1 weather 15 degrees koi fish can kill both. The optimum water temperature in koi fish is between 20℃ and 27℃. Although koi fish is a wide-temperature fish, it still prefers a warm environment. Too low temperature will also affect its vitality.