🌌 Galaxy Rasbora Quick Summary Guide

📏 Species Overview

• Scientific name: Danio margaritatus

• Size: 0.75–1 inch (2–2.5 cm)

• Temperament: Peaceful, timid

• Lifespan: ~3–5 years

• Schooling: Best in groups of 8–12+

🐠 Tank Requirements

• Tank size: Minimum 10 gallons; 20+ better for large groups

• Water flow: Low

• Aquarium type: Planted, dim lighting, hiding spots (plants, moss, driftwood)

🌡️ Water Parameters

• Temperature: 72–78°F (22–26°C)

• pH: 6.5–7.5

• Hardness: 5–15 dGH

• Ammonia/Nitrite: 0

• Nitrate: <20 ppm

🍽️ Diet

• Type: Omnivore, micro-predator

• Foods:

  • Live/frozen: daphnia, baby brine shrimp, microworms

  • High-quality micro pellets

  • Crushed flakes

• Frequency: 1–2× daily, small portions

👥 Tank Mates

Good:

• Shrimp

• Chili rasboras

• Pygmy corydoras

• Ember tetras

• Snails

Avoid:

• Fin-nippers

• Large or aggressive fish

• Anything that can eat them

💧 Maintenance

• Weekly 20–30% water changes

• Keep stable parameters (they dislike swings)

• Maintain good plant density for comfort

🐣 Breeding

• Difficulty: Easy to moderate

• Needs:

  • Dense moss or spawning mops

  • Separate fry rearing tank

• Adults may eat eggs

• Feed fry: infusoria → baby brine shrimp

⚠️ Common Issues

• Stress from bright lights or fast tankmates

• Poor colors = likely stress or low group size

• Fin rot if water quality is poor