The Phoenix Rasbora, scientifically known as Boraras merah, is one of the most vibrant and sought-after nano rasboras in the freshwater aquarium hobby. Famous for its fiery red coloration, compact size, and peaceful schooling behavior, this Rasbora fish is perfect for nano tanks, shrimp aquariums, and heavily planted aquascapes. Native to blackwater peat swamps and slow-moving streams of Southeast Asia, Boraras merah thrives in soft, acidic water rich in tannins and plant cover. This natural habitat explains its preference for warm temperatures, gentle filtration, and densely planted tanks. Often compared to Chili Rasboras and other micro fish, the Phoenix Rasbora stands out for its deeper red tones and calm temperament, making it a top choice for aquarists who love delicate, natural-looking setups. A full-grown Phoenix Rasbora reaches only 0.6–0.8 inches (1.5–2 cm), classifying it as a true nano fish. Its body displays a rich red to orange-red coloration with subtle darker accents along the midline. The Phoenix Rasbora is extremely peaceful, shy, and social, and should always be kept in groups of 8–12 or more. Larger schools increase confidence, reduce stress, and produce more vibrant coloration. Ideal Phoenix Rasbora tank mates include: Shrimp (Neocaridina & Caridina), snails, other nano Rasboras, Ember tetras, Pygmy corydoras, and small peaceful fish. Avoid large or aggressive fish, as their tiny size makes them vulnerable. At our Splashy Fish tropical fish store, our Phoenix Rasbora for sale and other freshwater fish for sale are carefully selected and packed with love! Visit us to buy them online or at our aquarium store in Virginia for more betta fish for sale, freshwater shrimp for sale, live aquatic plants for sale, and aquarium supplies. WHAT YOU CAN EXPECT FROM THIS FISH: Brilliant red coloration in a tiny nano fish Peaceful schooling species perfect for nano tanks Ideal for shrimp aquariums and planted tanks Extremely small adult size Hardy once established in stable conditions Stunning visual impact in groups RECOMMENDED TANK PARAMETERS: Tank Size: 5–10 gallons (larger preferred for schools) Temperature: 75°–82°F (24°–28°C) pH: 4.5–6.8 Hardness: 1–6 dGH Filtration: Gentle flow, sponge filter recommended CARE GUIDELINES: Diet: Micro-omnivore. Feed crushed flakes, nano pellets, baby brine shrimp, daphnia, and other micro foods suited for tiny mouths. Tank Setup: Heavily planted tanks with floating plants, leaf litter, dark substrate, and subdued lighting mimic their natural blackwater habitat. Behavior: Calm, schooling, and non-aggressive. Best coloration appears in groups with minimal stress. Visit here to explore more about How to Care for Rasbora Fish. Phoenix Rasbora Frequently Asked Questions (FAQs) How big do Phoenix Rasboras get? Phoenix Rasboras grow to only 0.6–0.8 inches, making them one of the smallest freshwater fish available. Are Phoenix Rasboras good for nano tanks? Yes. Phoenix Rasboras are ideal nano aquarium fish, thriving in tanks as small as 5 gallons when kept in proper groups. Are Phoenix Rasboras aggressive? No. They are completely peaceful and safe for shrimp tanks and community nano setups. { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "How big do Phoenix Rasboras get?", "acceptedAnswer": { "@type": "Answer", "text": "Phoenix Rasboras grow to only 0.6–0.8 inches, making them one of the smallest freshwater fish available." } },{ "@type": "Question", "name": "Are Phoenix Rasboras good for nano tanks?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Phoenix Rasboras are ideal nano aquarium fish, thriving in tanks as small as 5 gallons when kept in proper groups." } },{ "@type": "Question", "name": "Are Phoenix Rasboras aggressive?", "acceptedAnswer": { "@type": "Answer", "text": "No. They are completely peaceful and safe for shrimp tanks and community nano setups." } }] }
