The water flow of Lanshou goldfish can be smaller, because their activities are clumsy compared with other goldfish. If the water flow is too large, they need to swim all the time to resist the water flow. In addition, too much water flow will also affect their normal rest, and their physique will get worse and worse after a long time. But if the water flow is too small, the filtration effect will become worse. It is better for breeders to adjust the water flow according to the specific performance of Lanshou goldfish. If breeders find that they often approach the absorption port or involuntarily swim towards the absorption port, they should reduce the water flow. If it is found that the water flow has little influence on them, it can be slightly increased.

Lanshou goldfish does not require very high water, so breeders can choose tap water, well water, river water and lake water to raise them. However, no matter what water is used, it should be treated in advance to avoid making them uncomfortable.

If the breeder uses tap water, it needs to be taken out 2-3 days in advance and exposed to the sun. This can effectively remove chlorine from water and avoid chlorine affecting their health.

If breeders use well water, they also need to beat it out in advance and dry it for a period of time. Because the temperature of well water is low, breeders need to adjust their temperature to that in fish tanks before using it.

If breeders use river and lake water, they need to filter it first. Because rivers and lakes are easily polluted, and there are many harmful substances in the water, they need to be filtered before being used.