Dwarf Rasbora

The Dwarf Rasbora, also known as the Pygmy Rasbora, is a tiny and delicate freshwater fish admired for its vibrant reddish-orange body adorned with small dark spots. Native to Southeast Asia’s slow-moving, tannin-rich waters, this species is perfect for nano and planted aquariums. Despite its small size, it brings lively color and gentle activity when kept in groups.  

Dwarf Rasbora (Boraras maculatus) – Complete Care Guide Description The Dwarf Rasbora, also known as the Pygmy Rasbora, is a tiny and delicate freshwater fish admired for its vibrant reddish-orange body adorned with small dark spots. Native to Southeast Asia’s slow-moving, tannin-rich waters, this species is perfect for nano and planted aquariums. Despite its small size, it brings lively color and gentle activity when kept in groups. Water Parameters Soft, slightly acidic and stable water is ideal: Temperature: 24–28°C (75–82°F) pH: 5.0–7.0 Hardness: 1–8 dGH Tank Size: Minimum 20–30 liters (5–8 gallons) Water Flow: Gentle (low current preferred) Water Changes: 15–25% weekly Care & Maintenance Dwarf Rasboras require gentle care and stable conditions: Keep in groups of at least 8–10 for comfort and natural schooling. Provide a heavily planted aquarium with moss, floating plants, and leaf litter. Use soft lighting to mimic their natural habitat. Maintain excellent water quality—they are sensitive to fluctuations. Feed a fine, varied diet: micro pellets, crushed flakes, and live foods (infusoria, baby brine shrimp). Avoid strong filtration—use gentle flow systems. Behaviour & Temperament Extremely peaceful and shy fish. Prefer calm environments and dense planting. Active in short bursts, mostly mid to lower levels. Show best coloration and confidence in groups. Non-aggressive and delicate. Compatibility Ideal for nano and peaceful community aquariums. Compatible only with very small, gentle species. Avoid any fish that may intimidate or outcompete them. Suitable Tank Mates Other Boraras species Small rasboras Corydoras pygmaeus Small shrimp (Neocaridina, Caridina) Snails Tank Mates to Avoid Medium to large fish Aggressive or territorial species Fast, boisterous fish Fish that may outcompete them for food Predatory species Pro Tips Keep in larger groups for better coloration and reduced stress. Use leaf litter and botanicals to replicate natural blackwater conditions. Maintain very gentle water flow. Feed small, frequent meals suitable for their tiny mouths. Avoid sudden changes in water parameters. Ideal for nano aquascapes and shrimp tanks. Summary The Dwarf Rasbora is a tiny, vibrant, and peaceful fish perfect for nano aquariums. With stable soft water, dense planting, and proper group size, it thrives and creates a delicate yet stunning display in small community setups.