Koi is not a tropical fish, but a cold-water fish. Tropical fish generally live in temperatures above 25 degrees, while the highest survival temperature of Koi is 35 degrees. As long as the water does not freeze and the temperature of the water changes less, Koi can live, if the temperature of the water is high, the fish can easily die.
Koi belongs to cold-water poikilothermic animals, and has a strong ability to adapt to the living environment. The water temperature for this fish is 0-35 degrees, but the best living water temperature is 20-25 degrees. Because in this temperature range, the food intake and digestion of fish are the best, and the body growth of fish will also accelerate. If the water temperature is between 15 and 20 degrees, be sure to feed the fish less. When the water temperature drops below 5 degrees, the fish owner needs to stop eating. This fish is not afraid of cold water, but if the water temperature changes too fast, especially when the water temperature difference exceeds 3 degrees, Koi will easily get sick.
