Can Angelfish live with Neon Tetra?
🔴 RISKY
High risk due to water mismatch, aggression, or predation.
Angelfish
Pterophyllum scalare
| Adult Size: | 5.9" |
| Temperament: | semi-aggressive |
| Min Tank: | 40 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.5-7.5 |
Neon Tetra
Paracheirodon innesi
| Adult Size: | 1.2" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 68-77°F |
| pH Range: | 5.5-7.0 |
Water Parameter Overlap
| Parameter | Angelfish | Neon Tetra | Overlap |
|---|---|---|---|
| Temperature | 75-82°F | 68-77°F | 2°F ✓ |
| pH | 6.5-7.5 | 5.5-7.0 | 0.5 ✓ |
Why RISKY?
Temperament Match: semi-aggressive + peaceful. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Angelfish (5.9") vs Neon Tetra (1.2"). Large size difference → larger fish may eat smaller fish.
Score: 20.0/100 (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 40+ gallons:
Fluval Flex Aquarium Kit — $149.99
57-gallon kit suitable for angelfish
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.