It is more suitable for raising goldfish, sole catfish, Chinese betta fish, medaka and white cloud golden silk in the big water tank at home. No matter how big the water tank is at home, it is definitely not possible to raise large fish like koi, while many small fish belong to tropical fish, which have high requirements on water temperature, while the water tank is not suitable for heat preservation and installation of heating rods and other equipment, so only some small fish with lax temperature requirements can be raised, among which goldfish is one of the representatives.

1. Water quality: First of all, we should pay attention to water quality when raising fish in water tank. If the water quality is not good, the health of fish will also be affected to some extent. In order to ensure the cleanliness of the water body, it is necessary to change the water every once in a while. It is not easy to install filtration equipment in the water tank, so external filter barrels can be considered, which can also improve the water quality.

2. Water temperature: Although the fish in the water tank are wide-temperature, it doesn't mean that there is no problem in changing the temperature. After all, fish is still a temperature-changing animal, and its adaptability to temperature is limited, so it is necessary to avoid the large temperature difference between day and night, and don't put it in the sun, otherwise the temperature change will affect the health of fish.

3, dissolved oxygen: If the dissolved oxygen in water is low, fish farming will also have problems. In order to ensure sufficient dissolved oxygen, oxygen pump can be used to fill it for two hours every morning and afternoon. In addition, this fish tank does not need to be covered, so that the water surface can be fully contacted with the air, and the oxygen content can also be increased.