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Emerald Dwarf Rasbora (Microrasbora erythromicron) – Care Guide & For Sale

$5.99

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Dwarf Emerald Rasboras

The Emerald Dwarf Rasbora is a colorful, peaceful nano fish that is ideal for planted aquariums, nano community tanks, and many shrimp-safe setups. Known for its shimmering green-blue coloration and active schooling behavior, this species does best in groups and adds constant motion without overwhelming smaller tanks.

What You’ll Love About Emerald Dwarf Rasboras

Brilliant iridescent green-blue coloration that pops in planted aquariums
Perfect nano fish for small tanks and aquascapes
Peaceful temperament—great for community and shrimp-safe setups
Active schooling behavior brings constant movement and life to your tank
Small adult size (around 1 inch) keeps stocking options flexible
Thrives in planted tanks with natural décor and gentle flow
Easy to care for with stable water parameters
Best displayed in groups for stronger color and natural behavior
Compatible with other nano fish like rasboras, tetras, and small catfish
Excellent choice for both beginner and experienced aquarists

Tank Mates for Emerald Dwarf Rasboras

This species pairs well with other small, peaceful fish and invertebrates.

Great tank mates include:

Other nano rasboras and minnows
Small Tetras
Corydoras Catfish
Otocinclus
Freshwater shrimp (Neocaridina & Caridina)

Avoid large or aggressive fish that may intimidate or outcompete them.

Are Emerald Dwarf Rasboras Good for Beginners?

Yes—Emerald Dwarf Rasboras are an excellent choice for beginners, especially for hobbyists setting up a planted or nano aquarium. Their peaceful nature, small size, and relatively simple care requirements make them easy to manage compared to larger or more aggressive fish species.

These nano fish are very hardy once acclimated and adapt well to a range of stable water conditions. As long as you maintain consistent parameters and provide a well-planted environment, they are low-maintenance and forgiving for newer aquarists.

One of the biggest advantages for beginners is their compatibility with other peaceful species. Emerald Dwarf Rasboras do well in community tanks and are often considered shrimp-safe, making them a popular choice for aquarists who want to keep both fish and shrimp together.

To get the best results as a beginner:

Keep them in groups of at least 6 for comfort and natural behavior
Use a planted tank to reduce stress and enhance coloration
Maintain stable water conditions with regular water changes
Feed a varied diet of quality nano foods and occasional live or frozen treats

With the right setup, Emerald Dwarf Rasboras are a rewarding, low-risk fish that can help beginners build confidence while creating a vibrant and active aquarium.

Why Buy Emerald Dwarf Rasboras from The Shrimp Farm?

✅ Healthy, Active Fish
Our Emerald Dwarf Rasboras are carefully acclimated and monitored to ensure they arrive healthy, colorful, and active in your aquarium.

✅ Shrimp-Safe Community Fish
These peaceful nano fish are an excellent choice for planted tanks and can often be kept safely with adult shrimp and other small community species.

✅ Expert Nano Fish Care
We specialize in freshwater nano fish and shrimp, so every order is packed by hobbyists who understand proper handling and shipping practices.

✅ Fast, Insulated Shipping
All live fish orders are shipped with insulated packaging and appropriate weather protection to help ensure safe delivery year-round.

✅ Live Arrival Guarantee
Shop with confidence knowing your Emerald Dwarf Rasboras are covered by our live arrival guarantee.

✅ Perfect for Planted Aquariums
Their shimmering green coloration looks incredible in heavily planted aquariums with driftwood, moss, and darker substrates.

✅ Great Customer Support
Whether you are a beginner or experienced aquarist, our team is here to help with tank setup, compatibility questions, and care tips.

Emerald Dwarf Rasboras are one of the best nano fish for shrimp tanks thanks to their small size, peaceful temperament, and compatibility with Neocaridina Shrimp.

Please note: Fish must be shipped via Express Shipping ONLY due to the safety of the fish.

Backed by The Shrimp Farm's Live Arrival Guarantee!

Emerald Dwarf Rasbora | Origins & Care

Details

Dwarf Emerald Rasbora

Microrasbora erythromicron, also known as the dwarf emerald rasbora, is a nano fish species selectively bred for a striking sunkist-orange color. These small fish are appreciated by fish AND shrimp keepers for their peaceful nature. They are the perfect addition to a shrimp-/invertebrate setup or even a community tank with plants and other fish.

Dwarf Emerald Rasbora Behavior

Dwarf emerald rasboras are omnivorous scavengers. They will readily accept most flake foods and algae wafers, as well as freeze-dried daphnia, bloodworms, tubifex, and brine shrimp.

Dwarf emerald rasboras are a favorite in the hobby because of their incredibly peaceful temperament and therefore their ability to be kept with other species of fish and shrimp. They are very shy in small groups, so we recommend keeping them in groups of 10 or more so that they can be more active and playful.

Dwarf Emerald Rasbora Care

An omnivorous diet is key to helping keep your dwarf emerald rasboras happy and healthy. In addition, you will need to keep your tank water stable and of high quality. Find out more about Dwarf Emerald Rasboras in The Shrimp Farm University.

Buying Dwarf Emerald Rasboras

Dwarf emerald rasboras are an excellent addition to any planted tank, community tank, or shrimp tank due to their peaceful nature. We recommend keeping them with plants, rock, or driftwood that provide them with cover in order for them to really thrive.

Specifications

Emerald Dwarf Rasbora Care Guide (Microrasbora erythromicron)

The Emerald Dwarf Rasbora is a peaceful nano fish that thrives in planted aquariums and smaller community tanks. Known for its shimmering green-blue coloration and active schooling behavior, this species is easy to care for when kept in stable conditions and proper group sizes.

Tank Size for Emerald Dwarf Rasboras

Emerald Dwarf Rasboras do best in tanks that provide enough space for schooling and natural behavior.

Minimum tank size: 10 gallons
Recommended tank size: 15–20+ gallons for larger groups
Best kept in groups of 6–10 or more for comfort and color
More space = better schooling behavior and reduced stress

Heavily planted tanks help them feel secure and display their best colors.

Water Parameters for Emerald Dwarf Rasboras

Stable water conditions are key to keeping this species healthy and vibrant.

Temperature: 72–78°F
pH: 6.5–7.5
Hardness: Soft to moderately hard water
Prefer clean, well-filtered water with gentle flow

Consistency matters more than chasing exact numbers—avoid sudden swings.

Ideal Tank Setup for Emerald Dwarf Rasboras

Emerald Dwarf Rasboras thrive in natural, planted environments.

Dense plants like Java moss, stem plants, or carpeting plants
Driftwood and natural décor for hiding spots
Dark substrate to enhance coloration
Low to moderate lighting
Gentle filtration (sponge filters work great)

A planted aquascape will bring out their best color and natural schooling behavior.

Diet & Feeding

These nano fish are micro-predators and benefit from a varied diet.

High-quality micro pellets or nano flakes
Live or frozen foods like baby brine shrimp, daphnia, and microworms
Feed 1–2 times daily in small portions
Variety helps improve coloration and overall health

Temperament & Behavior of Emerald Dwarf Rasboras

Emerald Dwarf Rasboras are peaceful and active, making them ideal for community tanks.

Non-aggressive and easy to mix with other nano species
Naturally shy—more confident in groups
Active swimmers that stay in mid to upper levels
Display best behavior when kept in schools

Breeding Emerald Dwarf Rasboras

Breeding is possible in the right setup, especially in planted tanks.

Egg scatterers that lay eggs among plants or moss
No parental care—adults may eat eggs
Use moss or spawning mops to improve survival rates
Fry require very fine foods like infusoria or powdered fry food

How Many Emerald Dwarf Rasboras Should You Keep?

Because they are schooling fish, keeping enough individuals is important.

Minimum: 6
Ideal: 8–12+ for best color and activity
Larger groups create more natural schooling behavior

Are Emerald Dwarf Rasboras Shrimp Safe?

Yes—Emerald Dwarf Rasboras are generally considered shrimp-safe.

Safe with adult shrimp
May occasionally eat very small baby shrimp
Works well in planted shrimp tanks with hiding spaces

Common Care Tips

Keep them in groups for confidence and color
Maintain stable water conditions
Use plants and décor to reduce stress
Avoid aggressive tank mates
Feed a varied, high-quality diet

This makes the Emerald Dwarf Rasbora an excellent choice for hobbyists looking for a colorful, peaceful nano fish that thrives in planted aquariums and shrimp-friendly setups.

FAQ

How big do Dwarf Emerald Rasboras get?

Dwarf Emerald Rasboras are very small fish, growing up to only 0.8 inches in length.

How many Dwarf Emerald Rasboras can I keep per gallon?

Dwarf Emerald Rasboras are small and can be kept in a tank as small as 5 gallons. As a general rule of thumb, you can keep one inch of fish per gallon of water, so adjust your stocking levels accordingly. They do well in groups of at least six.

How long do Dwarf Emerald Rasboras live?

With proper care, Dwarf Emerald Rasboras can live up to 3 years.

Is Dwarf Emerald Rasboras easy to Breed?

Dwarf Emerald Rasboras can be bred in captivity, but it does require specific conditions. They prefer soft, slightly acidic water and a temperature range of 75-78°F for breeding. Females will scatter their eggs among plants, and the eggs will hatch in 24-36 hours. Fry can be fed infusoria or commercially available fry food.

What is the diet of Dwarf Emerald Rasboras?

Dwarf Emerald Rasboras are omnivores and will eat a variety of foods, including flakes, small pellets, and live or frozen foods such as brine shrimp and daphnia. They are best fed in small amounts multiple times a day.

What are the best tankmates for Dwarf Emerald Rasboras?

Dwarf Emerald Rasboras are peaceful and do well with other small, peaceful fish such as other rasboras, tetras, and small shrimp like Neocaridina or Caridina. Avoid keeping them with larger or aggressive fish that may bully or prey on them.

What is the best way to Acclimate my new Dwarf Emerald Rasboras?

It's important to acclimate your new Dwarf Emerald Rasboras slowly to avoid shock or stress. Float the bag containing the fish in your aquarium for 15-20 minutes to allow the temperature to adjust. Then, slowly add small amounts of water from your aquarium into the bag every 5-10 minutes until the bag is full. Carefully net the fish out of the bag and place them into your aquarium.

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