The Dwarf Neon Rainbowfish (Melanotaenia praecox) is a stunning, peaceful rainbowfish known for its electric blue body and bright red to orange fins. Hardy and very active, it’s an excellent choice for planted community aquariums and looks best when kept in a proper school.
Aquarium Care
Tank size: 20 gallons+ (30+ gallons recommended for larger groups)
Water parameters:
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Temperature: 24–28 °C (75–82 °F)
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pH: 7.0–8.0
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Hardness: soft to moderately hard
Social behavior:
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Peaceful, schooling fish
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Keep in groups of 6–10+ (more = better color and confidence)
Tankmates:
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Other peaceful rainbowfish
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Peaceful tetras and rasboras
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Corydoras
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Small loaches
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Peaceful dwarf cichlids (with caution)
Avoid: fin-nippers, aggressive cichlids, or large predatory fish.