The key points for raising koi mainly include the following aspects:
Koi can adapt to a relatively wide range of water temperatures, generally between 5 °C and 30 °C. However, the most suitable water temperature for them is between 18 °C and 28 °C. Within this range, koi grow at the fastest speed and are more active.
Koi are rather sensitive to changes in water temperature. If the water temperature changes drastically and the temperature difference exceeds 2 - 3 °C, koi will feel uncomfortable. Therefore, when the temperature is low in winter, a heater can be used to maintain a constant temperature. And when the temperature is relatively high in summer, appropriate shading can be done or they can be moved to a shady place.
In addition, koi also have certain requirements for water quality. They are suitable for growing in a water environment that is slightly alkaline and has low hardness. The change in pH should not be too large, and the contents of ammonia nitrogen, nitrite, and hydrogen sulfide in the water body should not exceed the standard. To ensure the health of koi, it is necessary to regularly check the water quality and keep it clean and stable.