Black Ruby Barb

The Black Ruby Barb (Pethia nigrofasciata) is a freshwater schooling fish valued for deep ruby tones and dark vertical barring, with males showing the most dramatic coloration. Native to South Asia (Sri Lanka), this species is popular in planted community aquariums because it combines visual impact with manageable care requirements. It is a top aquascaping barb for red-black contrast against green plant mass.

Appearance and Coloration

Black Ruby Barb 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: 6 cm (2.4 inches)
• Typical lifespan: 4-6 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: 20 gallons (75 L)
• Temperature: 20-26 C (68-79 F)
• pH: 6.0-7.0
• Aquascape direction: forest-style planting, subdued light, dark substrate, and driftwood
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Behavior and Temperament

Black Ruby Barb is a peaceful yet energetic schooling barb, with best temperament in proper group size. Keep groups of at least 6-8+ individuals so hierarchy and movement are distributed naturally. Good companion options include tetras, rasboras, corydoras, dwarf gouramis, and other peaceful barbs.

Diet and Feeding

Black Ruby Barb 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 Black Ruby Barb in a Planted Aquarium?

Black Ruby Barb 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.