Glowlight Rasbora

The Glowlight Rasbora (Trigonostigma hengeli) is a freshwater schooling fish valued for its neon orange lateral glow above a dark wedge mark, giving the school a floating ember effect. Native to Southeast Asia (Sumatra, Borneo), this species is popular in planted community aquariums because it combines visual impact with manageable care requirements. Its compact size and warm color make it excellent for nano-to-mid planted aquariums.

Appearance and Coloration

Glowlight Rasbora is known for clean pattern definition and color response that improves under stable water quality, varied feeding, and proper group size. In mature planted aquariums, the body pattern reads clearly even during fast schooling movement.

Size and Lifespan

• Adult size: 3 cm (1.2 inches)
• Typical lifespan: 3-5 years with stable parameters and quality diet

Ideal Aquarium Setup

This species performs best in a biologically mature aquarium that prioritizes oxygenation and stable chemistry.

• Tank size: 15-20 gallons (55-75 L)
• Temperature: 23-28 C (73-82 F)
• pH: 6.0-7.5
• Aquascape direction: soft flow, shaded planting, and fine-textured stems

Behavior and Temperament

Glowlight Rasbora is a very calm midwater schooling fish that shows best confidence in larger groups. Keep groups of at least 10+ individuals so hierarchy and movement are distributed naturally. Good companion options include micro tetras, other small rasboras, shrimp-safe community fish, and peaceful bottom dwellers.

Diet and Feeding

Glowlight Rasbora is classified here as Omnivore. Build a varied schedule with high-quality staple foods, plus frozen or live options several times per week. A rotating diet supports immunity, activity, and stronger display color.

Breeding Notes

Most cyprinids in this group are egg scatterers. Conditioning with diverse foods and offering fine-leaved plants or spawning media can improve egg survival. If breeding is the goal, move adults after spawning to reduce egg predation.

Why Keep Glowlight Rasbora in a Planted Aquarium?

Glowlight Rasbora provides movement, contrast, and schooling structure that helps a layout feel alive without overpowering the design. For aquascaping-focused community tanks, it is a practical and visually rewarding choice.