The light in the fish tank does not need to be on all the time. It can be on for 6-8 hours a day. Fish in nature are not always in a bright place, so long light is not good for fish, on the one hand, it will increase the risk of algae explosion, on the other hand, it will affect their rest, bad rest will lead to growth problems, and even lead to fish illness.
1. It is easy to explode algae: There are many factors for algae explosion, and illumination is one of them. If the illumination time is too long, it is easy to cause algae explosion. So try not to put the fish tank in the sunny place, and don't turn on the light all the time. In addition, we should pay attention to the amount of feeding, water eutrophication will also lead to algae explosion.
2. Affect rest: If the light is turned on for a long time, the rest of the fish will also be affected. Because fish have no eyelids, their eyes will always be open, and the bright environment will keep them feeding all the time, but also make them highly alert, which will affect their growth and development.
3. Cause disease: If the light is too long or too strong, some fish will get sick. For example, arowana, long time exposure to light may lead to its eyes, or the color will become dim, so we must control the time and intensity of light.
