Rasbora patrickyapi, a rare and elegant species ideal for aquascaped or blackwater setups: Species Overview Scientific Name: Rasbora patrickyapi Family: Danionidae Origin: Central Kalimantan, Indonesian Borneo (peat swamps, blackwater streams) Size: 4–7 cm (adult), commonly 5–6 cm Temperament: Peaceful, schooling IUCN Status: Near Threatened Ideal Group Size: 6–10 individuals Tank Requirements Minimum Tank Size: 10 gallons for a small group; 20+ gallons recommended for stability Water Parameters: Temperature: 23–27°C (73–81°F) pH: 4.5–6.5 (soft, acidic blackwater preferred) Hardness: 2–10 dGH Décor: Dark substrate, leaf litter, driftwood Dense planting and subdued lighting to mimic peat swamp conditions Filtration: Gentle flow; maintain pristine water quality (low bacterial load) Cover: Secure lid—rasboras can jump Diet & Feeding Natural Diet: Micro-invertebrates, insect larvae In Captivity: High-quality micro pellets and flakes Live/frozen: Daphnia, brine shrimp, bloodworms Feeding Tips: Offer small portions 1–2 times daily Rotate protein-rich foods for color and conditioning Behavior & Compatibility Social: Shoaling species; thrives in groups Tankmates: Peaceful nano fish: small tetras, danios, dwarf gouramis Bottom dwellers: Corydoras, Kuhli loaches Avoid: Aggressive or large fish Notes: Ideal for blackwater biotope or planted nano tanks Breeding Difficulty: Moderate to high Conditions: Separate breeding tank (10–15 gallons) Soft, acidic water (pH 5.0–6.5), temp 75–80°F Fine-leaved plants or spawning mops for egg scattering Process: Condition adults with live foods Remove parents post-spawning (they may eat eggs) Fry Care: Infusoria or powdered fry food initially; then baby brine shrimp Special Considerations Sensitive to poor water quality—perform frequent small water changes Best kept in mature, stable tanks with tannin-rich water for natural coloration Rare in trade; often wild-caught, so acclimation is crucial
