💎 Emerald Dwarf Rasbora Care Guide (Microrasbora erythromicron)

🌟 Overview The Emerald Dwarf Rasbora (Microrasbora erythromicron) is a stunning nano fish, loved for its emerald-green body with vertical dark barring and bright orange accents. Native to Lake Inle in Myanmar, these peaceful schooling fish thrive in heavily planted aquariums. Their small size, striking colors, and active schooling behavior make them ideal for aquascapers and nano tank keepers.

🔑 Quick Facts

• Scientific Name: Microrasbora erythromicron
• Common Name: Emerald Dwarf Rasbora
• Origin: Lake Inle, Myanmar
• Size: 0.75–1 inch (2–2.5 cm)
• Lifespan: 3–5 years
• Temperament: Peaceful, schooling
• Care Level: Easy to Moderate

🏠 Tank Requirements

• Minimum Tank Size: 10 gallons (larger schools do better in 20+)
• Water Temperature: 72–78°F (22–26°C)
• pH: 6.5–7.5
• Hardness: 3–10 dGH
• Aquascape: Planted tanks with driftwood, moss, and plenty of hiding spots
• Lighting: Moderate, enhances natural colors
• School Size: Keep in groups of 8–10+ for confidence and color display

🍽️ Diet

Emerald Dwarf Rasboras are micro-predators and do best with small foods:

• Crushed flakes & micro-pellets
• Frozen/live foods: baby brine shrimp, daphnia, cyclops, microworms
• Specialized nano foods for maximum coloration

🧑🤝🧑 Tank Mates

• Excellent with other peaceful nano fish: chili rasboras, celestial pearl danios, ember tetras
• Compatible with shrimp and snails (though shrimp fry may be eaten)
• Avoid large or aggressive tank mates

🧠 Behavior & Tips

• Males show brighter orange fins and may spar with each other
• Peaceful but shy without a large enough school and plant cover
• Look best in aquascaped tanks with dark substrates and floating plants
• Thrive in stable, clean water with gentle filtration

❓ FAQ

Q: How many Emerald Dwarf Rasboras should I keep?
A: At least 8–10, since they are shoaling fish and thrive in groups.

Q: Are Emerald Dwarf Rasboras beginner-friendly?
A: Yes, they are hardy once established, but their small size requires gentle tank mates.

Q: Do they breed in aquariums?
A: Yes, with dense plants or spawning mops, they scatter eggs, though fry need separation to survive.

Q: Can they live with shrimp?
A: Yes, adults coexist with shrimp, but tiny shrimp fry may be eaten.