Rasbora Patrickyapi

Rasbora patrickyapi, a rare and elegant species ideal for aquascaped or blackwater setups:

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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 

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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 

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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 

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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 

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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 

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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