Description
Emerald Dwarf Rasbora – Microrasbora erythromicron
Introduction:
The Emerald Dwarf Rasbora (Microrasbora erythromicron) is a captivating, tiny fish native to the slow-moving streams and tributaries of Myanmar. Its vibrant emerald-green coloration and small size make it an ideal addition to aquariums, especially those focused on nano setups. Growing to just 0.8 inches (2 cm), this species is perfect for aquarists looking to add color and movement to smaller tanks. Its peaceful nature and schooling behavior also make it a joy to observe.
1. Natural Habitat and Behavior
In the wild, the Emerald Dwarf Rasbora is found in clear, slow-moving waters with dense aquatic vegetation and soft, slightly acidic conditions. These fish are highly social and are typically seen in groups, often darting through the plant matter or foraging for food. In an aquarium, they will thrive in the presence of other peaceful species and are best kept in schools of at least 6-8 individuals to feel secure and display their natural schooling behavior. They prefer to stay in the mid and upper levels of the tank.
2. Aquarium Setup
The ideal aquarium setup for the Emerald Dwarf Rasbora is one that replicates its natural habitat. A 10-gallon tank or larger is suitable for a small group, with plenty of fine-leaved plants such as Java Moss, Anubias, or Hornwort. The water should be soft, with a pH range of 5.5-7.5, and temperatures between 72-79°F (22-26°C). The fish will appreciate areas with gentle water movement, so a moderate filtration system is recommended. Fine-gravel or sand substrates work well, and driftwood can be added to provide hiding spots.
3. Diet and Feeding
Emerald Dwarf Rasboras are omnivores with a preference for smaller food items. They will eagerly accept high-quality flake food, micro-pellets, and live or frozen foods such as brine shrimp, daphnia, and micro-worms. Due to their small size, it is important to feed them appropriately sized food and offer small portions several times a day. They will also benefit from a variety of plant matter, such as finely chopped spirulina or algae wafers.
4. Compatibility with Other Fish
This species is peaceful and thrives in a community tank with other small, non-aggressive fish. Ideal tankmates include small tetras, other rasboras, dwarf cichlids, and small catfish like Corydoras. Avoid keeping them with larger or aggressive species, as they can be intimidated or outcompeted for food. The key is to house them with other peaceful fish that won’t outcompete them for food or space.
5. Common Challenges and Tips
- Water Quality: Being small and sensitive to water quality, the Emerald Dwarf Rasbora benefits from regular water changes and a well-maintained filtration system. Keep the water soft, slightly acidic, and free from excess nutrients to promote health.
- Schooling: As with most rasboras, this species thrives in schools. It is essential to keep them in groups to prevent stress and ensure that they show their natural social behavior. A group of at least 6-8 individuals is recommended.
- Feeding Size: Because of their tiny size, ensure the food is finely ground or small enough for them to consume. Overfeeding can lead to water quality issues, so it’s essential to feed in small amounts that are consumed quickly.
Conclusion
The Emerald Dwarf Rasbora (Microrasbora erythromicron) is a stunning, peaceful species that brings vibrancy and movement to any aquarium. With its small size, striking emerald coloration, and peaceful nature, it is perfect for nano aquariums or aquariums with small, community-friendly species. With the right care, tank mates, and feeding regimen, the Emerald Dwarf Rasbora can thrive and provide years of enjoyment in your aquarium.
