The difference between fish sleeping and lying on the tank is still obvious. When fish sleep, every once in a while, the fins will swing slightly, the range is not very large, but it is more regular. While the lying tank hardly moves, and it looks uncoordinated, and the fish feel tired. There are many reasons for it to lie prone, which may be the fluctuation of water quality, the sudden drop of temperature, or the indigestion caused by feeding too much.

1. Water quality fluctuation: Water quality fluctuation is a common reason for fish to lie prone to the tank. We must pay attention to the water when raising fish. If the water is not good, the health of fish will be threatened. Usually, in order to maintain the water quality, it is necessary to change the water every once in a while, and pay attention to filtration at ordinary times, so as to ensure the cleanliness of the water body.

2, sudden drop in temperature: As a temperature-changing animal, the temperature change also has a great influence on fish. If the temperature drops sharply, it will also make fish lie prone. Usually, we should pay attention to the water temperature in fish farming. If it is tropical fish, the temperature must be kept above 20 ℃, and the water temperature of wide-temperature fish should not be too low.

3. Overfeeding: If a fish is fed too much food, it will also suffer from indigestion, which will cause it to lie prone. In the daily feeding process, we should first pay attention to the choice of feed and avoid feeding something that will absorb water and swell. Secondly, we should control the food intake every time we feed, and ensure that the fish finish eating within 3-5 minutes.