Blue Rainbowfish 2"
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🐟 Blue Rainbowfish Care Sheet
🔹 Overview
| Category | Details |
|---|---|
| Scientific Name | Melanotaenia sp. (Blue variant) |
| Common Name | Blue Rainbowfish |
| Origin | Australia, New Guinea, and nearby islands (species dependent) |
| Adult Size | 8–12 cm (3–5 in), depending on species |
| Lifespan | 5–8 years |
| Temperament | Peaceful, schooling |
| Tank Level | Mid to upper |
🔹 Tank Setup
| Parameter | Ideal Range |
|---|---|
| Tank Size | 100+ liters (25+ gallons) for a small school |
| Temperature | 24–28 °C (75–82 °F) |
| pH | 6.5–7.5 |
| Hardness | 5–15 dGH |
| Substrate | Sand or fine gravel |
| Decor | Plants, driftwood, open swimming areas |
| Lighting | Moderate to bright |
| Filtration | Moderate flow; well-oxygenated water |
Tips:
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Keep in groups of at least 6–8 to maintain natural schooling behavior.
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Provide open swimming areas with some plants or floating cover.
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Regular water changes enhance color intensity.
🔹 Diet
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Type: Omnivorous
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Best Foods: High-quality flakes or pellets, frozen/live foods (brine shrimp, daphnia, bloodworms), vegetable matter.
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Feeding Frequency: 2–3 small feedings daily.
🔹 Behavior & Compatibility
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Peaceful and active; excellent in community aquariums.
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Males are brighter in color and may show some territorial displays during breeding.
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Mid- to upper-level swimmers that enjoy open water.
🧭 Tank Mate Guide
✅ Compatible Species
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Other rainbowfish species
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Tetras and danios
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Corydoras catfish
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Peaceful barbs
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Gouramis (peaceful species)
⚠️ Avoid or Use Caution With
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Aggressive or very large fish
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Fin-nippers or predatory species
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Slow-moving or delicate fish
🐣 Breeding Info
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Spawning Method: Egg scatterers; fine-leaved plants or spawning mops recommended.
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Parental Care: None; adults may eat eggs.
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Fry Care: Feed infusoria or liquid fry food initially, then baby brine shrimp.
🌿 Fun Facts
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Named for their vivid blue coloration and metallic sheen.
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Excellent centerpiece for community tanks due to bright colors and schooling behavior.
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Hardy and adaptable if kept in proper water conditions.