The Red Hengeli Rasbora (often referred to as the Glowlight Rasbora) is a stunning, peaceful nano-fish that is a favourite in the Australian aquascaping community. They are known for their vibrant "neon" orange stripe and their tight schooling behaviour.
Here is the essential profile for keeping them happy and healthy.
Quick Care Stats
Parameter: Recommended Level
Minimum Tank Size: 40–60 Litres
Water Temperature: 23°C – 28°C
pH Range: 6.0 – 7.5 (Prefers slightly acidic)
Hardness: 2 – 10 dKH
Lifespan: 3 – 5 years
Detailed Guide
Origin
These fish originate from the tropical waters of Southeast Asia, specifically Indonesia (Sumatra and Borneo) and Thailand. They are typically found in slow-moving blackwater streams and peat swamps shaded by heavy forest canopies.
Diet
In the wild, they are micropredators. In a home aquarium, they are unfussy omnivores, but because they have very small mouths, you must provide appropriately sized food:
Dry Food: High-quality crushed flakes or "micro" pellets.
Live/Frozen Food: They go crazy for baby brine shrimp, daphnia, and cyclops.
Colour Enhancement: Feeding foods high in carotenoids will help maintain that "glowing" orange strike.
Tank Environment
Schooling Nature: You should keep them in a group of at least 8–10. In smaller numbers, they become shy and lose their vibrant colour.
Aquascaping: They look best against a dark substrate with plenty of live plants (like Java Fern or Cryptocorynes).
Water Flow: They prefer gentle to moderate water movement; avoid high-pressure powerheads that might toss them around the tank.
A Quick Correction
You’ll often see these labelled interchangeably with Trigonostigma espei (Lambchop Rasbora). While they look nearly identical, the Red Hengeli (Trigonostigma hengeli) usually has a thinner, more translucent body with the orange pigment concentrated mostly around the "black "lambchop" mark. The Espei tends to be a deeper bronze/red across the whole body.
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