Overview
The Neon Dwarf Rainbowfish (Melanotaenia praecox) is a beginner freshwater species known for its electric blue, red fins coloration. Electric blue body. Mid.
Origin & Appearance
Origin: Papua New Guinea.
Colors: Electric Blue, Red fins.
Body Shape: Deep Fusiform (oval/robust). Typical adult dimensions: 6.0 x 1.2 x 2.4.
Sexual Dimorphism: Strong; males more vivid colors and larger fins.
Tank & Water Requirements
| Min Tank Size | 20 gallons |
| Temperature | 72–82°F |
| pH Range | 7–8 |
| Water Hardness (GH) | 8-15 |
| Bioload | low |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Mid |
Behavior & Activity
Active mid-level schooler; males flash electric blue during morning courtship displays; fast tight schooling
Speed: 55/100Aggression: 2/10diurnalSchooling (6+)
Breeding
Moderate; egg scatterer among mops/plants
Common Diseases
💊 Ich
Expert Notes
Electric blue body; red fins