If Lanshou goldfish is raised according to normal feeding density, you can choose not to filter. Because Lanshou goldfish do not have particularly high requirements for water quality and oxygen, they can live well as long as they can change water frequently and keep the water quality clean. However, when the feeding density is high, it is better to use filtration. Because of the high density, fish excrement will increase, and the water quality will deteriorate faster. Breeders need to change water frequently to keep the water clean. However, Lanshou goldfish like clean and refreshing old water, and frequent water change will make them feel uncomfortable, so it is recommended to use filtration.

Lanshou goldfish to use oxygen under normal feeding conditions, and their demand for oxygen is not high. As long as the water quality is clean and the filtration system is often opened, sufficient dissolved oxygen in the water can be ensured. However, in some cases, oxygen must be used. For example, when the feeding density is high, the dissolved oxygen in the water cannot meet them, so the breeder should use oxygen beating tools to ensure sufficient dissolved oxygen in the water. In addition, when the temperature is high, oxygen is also needed, because high temperature will consume oxygen in water. In rainy days, oxygen is also needed, because the air pressure is low in rainy days, and fish are prone to lack of oxygen.