The Story
Dwarf Rasbora (Boraras maculatus)
One of the smallest and most peaceful nano fish for planted and shrimp-friendly aquariums.
Dwarf Rasbora, also known as Boraras maculatus, is a tiny freshwater fish prized for its delicate size, subtle red coloration, and extremely peaceful nature. It is one of the best choices for nano aquariums and shrimp tanks, where larger fish would be too aggressive or overwhelming.
Why this fish stands out
- Extremely small size, perfect for nano tanks
- Peaceful temperament, ideal for shrimp-friendly setups
- Subtle red tones that look best in planted aquariums
- Low bioload, suitable for smaller systems
Best for
- Nano aquariums (5–15 gallons)
- Shrimp tanks and low-stress environments
- Heavily planted aquascapes
- Hobbyists looking for subtle, natural aesthetics
Behavior & Group Size
Dwarf Rasboras are true schooling fish and should always be kept in groups. We recommend at least 10–15 fish for best behavior and confidence.
In small groups, they tend to hide and lose color. In larger groups, they become more active and display better coloration.
Tank Setup
These fish thrive in calm, planted environments with minimal disturbance.
- Dense plants and moss for cover
- Dark substrate enhances red coloration
- Low to moderate lighting
- Gentle water flow (avoid strong current)
They are especially suitable for natural-style aquascapes and shrimp-focused tanks.
Water Parameters
- Temperature: 22–28°C
- pH: 5.5–7.0
- Size: 1.5–2 cm
- Temperament: Very peaceful
- Care Level: Easy to Moderate
While they are often associated with soft, acidic water, properly acclimated fish can adapt well to stable tap water conditions.
Feeding
Due to their extremely small size, Dwarf Rasboras require fine foods.
- Micro pellets or crushed flakes
- Baby brine shrimp
- Microworms or other small live foods
Feeding appropriately sized food is key to maintaining their health and growth.
Tank Mates
Dwarf Rasboras are best kept with other very small, peaceful species.
- Other Boraras species
- Small rasboras
- Shrimp (generally safe, including juveniles)
Avoid larger or active fish, as they may outcompete them for food or cause stress.
Topick Aquarium Insight
This species is often described as “delicate,” but in reality, it is not fragile — it is simply small and easily outcompeted.
In stable, low-competition environments, Dwarf Rasboras are extremely rewarding and long-lasting fish.
FAQ
Are Dwarf Rasboras good for beginners?
Yes, especially in calm, planted tanks with appropriate tank mates.
How many should I keep?
At least 10–15 for proper schooling behavior.
Can they live with shrimp?
Yes. They are one of the most shrimp-safe fish available.
Do they need a heater?
Yes. Stable temperature is important even for nano species.
Description
Dwarf Rasbora (Boraras maculatus)
One of the smallest and most peaceful nano fish for planted and shrimp-friendly aquariums.
Dwarf Rasbora, also known as Boraras maculatus, is a tiny freshwater fish prized for its delicate size, subtle red coloration, and extremely peaceful nature. It is one of the best choices for nano aquariums and shrimp tanks, where larger fish would be too aggressive or overwhelming.
Why this fish stands out
- Extremely small size, perfect for nano tanks
- Peaceful temperament, ideal for shrimp-friendly setups
- Subtle red tones that look best in planted aquariums
- Low bioload, suitable for smaller systems
Best for
- Nano aquariums (5–15 gallons)
- Shrimp tanks and low-stress environments
- Heavily planted aquascapes
- Hobbyists looking for subtle, natural aesthetics
Behavior & Group Size
Dwarf Rasboras are true schooling fish and should always be kept in groups. We recommend at least 10–15 fish for best behavior and confidence.
In small groups, they tend to hide and lose color. In larger groups, they become more active and display better coloration.
Tank Setup
These fish thrive in calm, planted environments with minimal disturbance.
- Dense plants and moss for cover
- Dark substrate enhances red coloration
- Low to moderate lighting
- Gentle water flow (avoid strong current)
They are especially suitable for natural-style aquascapes and shrimp-focused tanks.
Water Parameters
- Temperature: 22–28°C
- pH: 5.5–7.0
- Size: 1.5–2 cm
- Temperament: Very peaceful
- Care Level: Easy to Moderate
While they are often associated with soft, acidic water, properly acclimated fish can adapt well to stable tap water conditions.
Feeding
Due to their extremely small size, Dwarf Rasboras require fine foods.
- Micro pellets or crushed flakes
- Baby brine shrimp
- Microworms or other small live foods
Feeding appropriately sized food is key to maintaining their health and growth.
Tank Mates
Dwarf Rasboras are best kept with other very small, peaceful species.
- Other Boraras species
- Small rasboras
- Shrimp (generally safe, including juveniles)
Avoid larger or active fish, as they may outcompete them for food or cause stress.
Topick Aquarium Insight
This species is often described as “delicate,” but in reality, it is not fragile — it is simply small and easily outcompeted.
In stable, low-competition environments, Dwarf Rasboras are extremely rewarding and long-lasting fish.
FAQ
Are Dwarf Rasboras good for beginners?
Yes, especially in calm, planted tanks with appropriate tank mates.
How many should I keep?
At least 10–15 for proper schooling behavior.
Can they live with shrimp?
Yes. They are one of the most shrimp-safe fish available.
Do they need a heater?
Yes. Stable temperature is important even for nano species.
