Salt is effective for fish lying in the tank. Usually, after the fish lie prone, don't worry about taking medicine, because there are many reasons for lying prone, not all of which are caused by illness, and taking medicine is not very helpful to the rehabilitation of the fish. For the prone tank, it is usually necessary to change the water first to improve the water environment, and then raise the temperature appropriately. After the temperature rises, the vitality of the fish can be restored. Then add a little salt at a concentration of no more than five thousandths, which can change the osmotic pressure, prevent bacteria from invading and reduce the burden on the kidneys.

1. Poor water quality: Fish lie prone to the tank, which is usually related to water quality. If you don't change the water for a long time, the water quality will deteriorate, so the fish will feel uncomfortable, which will cause it to lie prone. If you want to avoid this situation, you should pay attention to changing water at ordinary times, usually once every five to seven days, and you can change about a quarter each time.

2, sudden change of temperature: As a temperature-changing animal, fish is not very adaptable to temperature, and sudden change of temperature will also cause lying down. In view of this situation, the best way is to control the temperature and keep it constant. Usually, heating rods should be installed in fish tanks to avoid large changes in water temperature.

3. Scared: When a fish is frightened, it may lie prone. At this time, the treatment is to rest and avoid being disturbed again. After a period of time, it will recover by itself.