Family: Cyprinidae
A fast-water stream fish with striking green-blue vertical bars; needs strong current and high oxygen.
The pale chub is the emblem of China's mountain streams — torpedo-fast, marble-flanked, and hung with blue-green bars. It is a river fish first and an aquarium fish second: only a long, well-oxygenated tank with honest current keeps it in condition.
Only with equally large, fast, cool-water fish. Anything small enough to fit in their mouth will eventually be eaten, and slow fish are harassed by their constant activity.
In air-conditioned or temperate homes, usually not — aim to keep water below 22 °C in summer. In hot regions without climate control, a chiller or fan is strongly recommended.
Glass-surfing is typical of newly introduced active stream fish and usually subsides in days. Persistent pacing means the current is too weak, the tank is too small, or the group is too small — keep at least five.
Cool water, strong current, live food and a group with both sexes. Males color up most intensely when they can display to rivals, so do not keep a single male alone.
Yes, in temperate climates a deep, shaded garden pond is excellent year-round; provide aeration in summer and expect natural spawning over gravel.