Can Cardinal Tetra Live With Fancy Goldfish?
Cardinal Tetra and Fancy Goldfish are NOT compatible tank mates.
Detailed Analysis
Temperature
⚠ Use Caution
Very narrow temperature overlap (73–74°F). Maintaining stable temp in this range may be difficult.
pH
✓ Compatible
Good pH overlap at 6.5–7.0.
Size
⚠ Use Caution
Significant size difference (8" vs 2"). Fancy Goldfish may bully or stress Cardinal Tetra.
Temperament
✓ Compatible
Both fish have compatible temperaments.
Swim Level
✓ Compatible
Swim level compatibility is fine.
Trait Conflict
✗ Not Compatible
Fancy Goldfish is a coldwater species and should not be kept with tropical fish like Cardinal Tetra.
Important Notes
- Cardinal Tetra is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 20 gallons
| Parameter | Cardinal Tetra | Fancy Goldfish |
|---|---|---|
| Temperature | 73–84°F | 60–74°F |
| pH | 5–7 | 6.5–8 |
| Max Size | 2" | 8" |
| Temperament | Peaceful | Peaceful |
| Swim Level | Middle | All |
| Min Tank | 10 gal | 20 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.