Can Neon Tetra live with Oscar?
🔴 RISKY
High risk due to water mismatch, aggression, or predation.
Neon Tetra
Paracheirodon innesi
| Adult Size: | 1.2" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 68-77°F |
| pH Range: | 5.5-7.0 |
Oscar
Astronotus ocellatus
| Adult Size: | 12.0" |
| Temperament: | aggressive |
| Min Tank: | 75 gal |
| Temperature: | 74-81°F |
| pH Range: | 6.0-7.5 |
Water Parameter Overlap
| Parameter | Neon Tetra | Oscar | Overlap |
|---|---|---|---|
| Temperature | 68-77°F | 74-81°F | 3°F ✓ |
| pH | 5.5-7.0 | 6.0-7.5 | 1.0 ✓ |
Why RISKY?
Temperament Match: peaceful + aggressive. One aggressive → predation/nipping risk.
⚠️ Size Predation Risk: Neon Tetra (1.2") vs Oscar (12.0"). Large size difference → larger fish may eat smaller fish.
Score: 35.0/100 (RISKY threshold: GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Stocking Calculator
Enter tank size to calculate safe stocking levels:
Recommended Equipment
Based on tank size 10+ gallons:
Tetra Easy Balance Plus — $12.99
Water conditioner for tetra tanks
Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies. Always observe, quarantine new arrivals for 2-4 weeks, and avoid overcrowding.