Mosquito Rasbora

Overview

The Mosquito Rasbora (Boraras brigittae) is one of the smallest fish in the hobby, with males displaying intense red colouration. Perfect for nano planted tanks and shrimp setups.

Water Parameters

• Temperature: 22–28°C (72–82°F)
• pH: 4.0–7.0 (prefers acidic)
• Hardness: 1–10 dGH (soft water preferred)

Tank Setup

• Minimum tank size: 20 litres for 8+
• Decor: Dense planting, floating plants; dim lighting essential

Diet

• Base: Micro flake, crushed granules
• Treats: Micro worms, daphnia, baby brine shrimp
• Note: Very small mouth — food must be appropriately sized

Temperament & Tank Mates

• Temperament: Peaceful, shy schooling fish
• Best companions: Other nano fish, dwarf shrimp, snails
• Avoid: Any fish large enough to eat them
• Schooling: Minimum 8; they feel safe in groups

Common Issues

• Extremely small — the smallest fish in most setups
• Stress easily from bright light or sudden movements
• Lifespan: 2–3 years