Family: Cyprinidae
Onychostoma gerlachi — a Cyprinidae from southern Chinese mountain streams, calm, undemanding and well-suited to community life. Reaches 23.7–34.8 cm; small groups recommended. 18–26 °C.
Onychostoma gerlachi is a Cyprinidae from southern Chinese mountain streams. In the wild it prefers clear streams and rivers over gravel; in the aquarium it stays calm, undemanding and well-suited to community life. Plan on 23.7–34.8 cm of adult fish at 18–26 °C. Related profiles: Onychostoma barbatulum, Onychostoma angustistomata, Onychostoma elongatum.
A moderate-level species: calm, undemanding and well-suited to community life; stable water matters more than fancy equipment.
Hold 18–26 °C and keep it stable — 18–26 °C typical for the genus. Room temperature to heated, depending on origin.
Adults reach 23.7–34.8 cm; it is bottom-dwelling. Plan for at least 500 litres.
Unfussy omnivore; varied diet keeps condition. Feed two small meals a day rather than one large one.
Calm, undemanding and well-suited to community life; small groups recommended. Good company: Robust schooling cyprinids — Add activity without conflict. Keep away from Much larger predators — Risk at night.
Its home waters are southern Chinese mountain streams — clear streams and rivers over gravel, with moderate, well-oxygenated current.
Jumping is not a known issue; cover the tank anyway during water changes.
In the aquarium: spawns freely; remove parents to save the eggs. Males often slimmer and more colourful.