Can Common Goldfish Live With Congo Tetra?
Common Goldfish and Congo Tetra 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 6.5–7.5.
Size
⚠ Use Caution
Significant size difference (12" vs 3.5"). Common Goldfish may bully or stress Congo Tetra.
Temperament
✓ Compatible
Both fish have compatible temperaments.
Swim Level
✓ Compatible
Swim level compatibility is fine.
Trait Conflict
✗ Not Compatible
Common Goldfish is a coldwater species and should not be kept with tropical fish like Congo Tetra.
Important Notes
- Congo Tetra is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 45 gallons
| Parameter | Common Goldfish | Congo Tetra |
|---|---|---|
| Temperature | 50–74°F | 73–82°F |
| pH | 6.5–8 | 6–7.5 |
| Max Size | 12" | 3.5" |
| Temperament | Peaceful | Peaceful |
| Swim Level | All | Middle |
| Min Tank | 30 gal | 30 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.