Can Angelfish live with Swordtail?
🟡 CAUTION
Case-by-case. Watch group sizes, tank size, and feeding zones.
Angelfish
Pterophyllum scalare
| Adult Size: | 5.9" |
| Temperament: | semi-aggressive |
| Min Tank: | 40 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.5-7.5 |
Swordtail
Xiphophorus helleri
| Adult Size: | 5.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 20 gal |
| Temperature: | 72-78°F |
| pH Range: | 7.0-8.0 |
Water Parameter Overlap
| Parameter | Angelfish | Swordtail | Overlap |
|---|---|---|---|
| Temperature | 75-82°F | 72-78°F | 3°F ✓ |
| pH | 6.5-7.5 | 7.0-8.0 | 0.5 ✓ |
Why CAUTION?
Temperament Match: semi-aggressive + semi-aggressive. Semi-aggressive → watch territory and feeding.
Score: 50.0/100 (CAUTION 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.