If the water flow in the fish tank is too fast, it is not good for them. Because Lanshou goldfish is a goldfish cultivated the day after tomorrow, it has been living in still water since it was cultivated. If the water flow for feeding them is too large, it will affect their rest. After a long time, their physical condition and mental state will get worse and worse, and their immunity will also decline. Finally, their physique will deteriorate or die. Moreover, if the current is too large, Lanshou goldfish will keep swimming to fight against the current. They keep swimming and can't rest, so they are prone to sudden death.

When raising Lanshou goldfish, many breeders will choose to install filters, which can not only reduce the frequency of water change, but also keep the water quality clean and fresh. However, when many people use filters, they pay attention to whether they can completely suck away excrement and food residues, and don't care about water flow, so Lanshou will suffer from discomfort. When using the filter, the breeder can adjust the power to medium, which can not only slow down the flow of water, but also keep the water clean. Moreover, the filtration system does not need to be turned on all day, but can be turned on for several hours every day to suck away the garbage in the fish tank.