Koi need to bask in the sun, but it is not suitable for strong light or long time light. In spring, the weather is warmer, the sunshine outside is softer, and the temperature is neither cold nor hot. At this time, the fish tank can be moved from indoor to outdoor, so that they can receive light. It should be noted that if the temperature drops suddenly, the film should be covered quickly to keep the water temperature stable.
In summer, the temperature is very high and the fish can't get direct sunlight, so the fish owner needs to cover the sunshade net. In autumn, the temperature of the water will drop and the sunshine will be weaker, which is the most suitable state for fish growth. It can increase the amount of protein food and improve the growth rate of fish. In winter, when the temperature drops, the carp can not survive and need to move the tank indoors. The temperature of the water should be kept at 5-25 degrees.
Aquarium lamp is not a necessity for koi life. The use of aquarium lights, on the one hand, is to make the pigmentation of the fish body, making the color of the koi body good-looking and shiny. On the other hand, it can also enhance its ornamental value. But this is not necessary for its growth.
