Description
Scientific Name: Trigonostigma heteromorpha
Common Name: Harlequin Rasbora
Adult Size: 1.75 to 2 inches (4.5 to 5 cm)
Life Expectancy: 5–8 years (with proper care)
Habitat: Slow-moving streams and peat swamps in Southeast Asia (Thailand, Malaysia, Singapore, and Sumatra) with soft, acidic, tannin-rich water and dense vegetation
Minimum Tank Size: 10 gallons (38 liters) for a small group; 20+ gallons recommended for a proper school
Ideal Temperature: 22°C – 27°C (72°F – 81°F)
pH Range: 6.0 – 7.5
Water Hardness: 2 – 15 dGH
Temperament: Peaceful, social, schooling fish. Best kept in groups of 6 or more. Excellent community fish.
Diet: Omnivorous
Preferred Foods: High-quality flake food, micro pellets, freeze-dried bloodworms, daphnia, brine shrimp, and live/frozen options
Feeding Tips: Feed small portions 1–2 times daily. Ensure all fish get access to food in a community tank.
