Onychostoma simum — a Cyprinidae from southern Chinese mountain streams, mostly peaceful community fish. Reaches 31.1–45.7 cm; singly or in small groups depending on temperament. 18–26 °C.
Care parameters
Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
31.1–45.7 cm
Minimum tank
500 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Mostly peaceful community fish
Origin
southern Chinese mountain streams
Species overview
Cyprinidae species Onychostoma simum comes from southern Chinese mountain streams. A adaptable species that forgives beginner mistakes more readily than most. It lives on the bottom. Adults reach 31.1–45.7 cm. Singly or in small groups depending on temperament. Give it clean water and room to behave naturally, and it will largely care for itself. Maintain 18–26 °C at pH 6.5–7.5. Best suited to a keeper who can match its natural water.
Native biotope
Habitat
Clear streams and rivers over gravel
Flow
Moderate, well-oxygenated current
Dissolved O₂
Appreciates well-oxygenated water
Aquascape & hardware
Substrate
Fine gravel and sand
Hardscape
Water-worn stones and driftwood
Plants
Hardy rooted plants along the margins
Temperament, diet & tankmates
Schooling
Singly or in small groups depending on temperament
Diet
Accepts quality flakes, granules and frozen foods
Recommended tankmates
Similar-sized peaceful community fish — Compatible size and temperament