Luhan fish is a hybrid species, can only live in the aquarium, can not accept the sun. And light can promote the color of fish. If the fish can not receive light for a long time, the color of the fish body will darken and lose luster, which will affect the ornamental effect. However, light irradiation can also stimulate the development of photoreceptor cells containing pigments in scales and enhance the brightness of fish body color. Therefore, in order to maintain body color, it must be illuminated by light. But too much light can cause the photoreceptor cells to die. The fish's body color not only can not be brightened, but also will become dark and dull. Therefore, the fish can be irradiated for six hours a day.
The choice of lamps and lanterns is also very important, usually there are two kinds of external lights and diving lights. The external lamp is placed above the water surface, and its light will be weakened by the refraction of the water surface. However, this kind of lighting is relatively soft and will not make the fish uncomfortable. Submersible lights are placed directly in the water, the brightness of the light is higher, but over time, algae will grow. These two kinds of lights are used in the cultivation of Luo Han fish, mainly external lights, and diving lights are usually only one or two. There are many colors of lights, and white led lights are used more. It can also be selected according to the body color of the Luo Han fish, and then installed in the fish tank with the white lamp.
