delicate loach — a Cobitidae from Japan, peaceful, sociable and slightly nocturnal. Reaches 7.1–10.5 cm; sociable; keep 4–6 so night-time activity stays confident. 18–26 °C.
Care parameters
Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
7.1–10.5 cm
Minimum tank
132 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Peaceful, sociable and slightly nocturnal
Origin
Japan
Species overview
Cobitidae species Niwaella delicata comes from Japan. A sand-sifting bottom resident most active after the lights fade. It lives on the bottom. Adults reach 7.1–10.5 cm. Sociable; keep 4–6 so night-time activity stays confident. Choose sand over gravel, feed after dusk, and keep ammonia at zero — loaches punish neglect visibly. Maintain 18–26 °C at pH 6.5–7.5. A solid choice for a well-planned community tank.
Native biotope
Habitat
Sandy stretches of slow rivers
Flow
Gentle current
Dissolved O₂
Tolerates moderate oxygen levels
Aquascape & hardware
Substrate
Fine sand for burrowing
Hardscape
Smooth stones and driftwood caves
Plants
Low-light tolerant plants
Temperament, diet & tankmates
Schooling
Sociable; keep 4–6 so night-time activity stays confident
Diet
Omnivore that appreciates live or frozen treats
Recommended tankmates
Other peaceful bottom fish — Share the lower water without conflict