Black Ghost Knife
Black Ghost Knife is a semi-aggressive freshwater fish that needs a tank of at least 100 gallons (379 L), water at 73-82°F (23-28°C) and a pH of 6-8.
Also searched as: black ghost knife, apteronotus albifrons
Quick facts
Electric fish. Nocturnal. Needs hiding places. Sensitive to water quality.
| Minimum tank | 100 gallons (379 L) |
|---|---|
| Temperature | 73-82°F (23-28°C) |
| pH | 6-8 |
| Temperament | Semi-aggressive |
| Swim level | Bottom |
| Group size | Can be kept singly |
| Tank type | Freshwater |
Good tank mates
Ranked by water overlap and temperament, using the same checks as the MyAquaLog compatibility tool.
- Plecostomusmin tank 30 gal
Temperature overlap 73-82°F, pH overlap 6.5-7.5. Semi-aggressive species may stress peaceful fish.
- Siamese Algae Eatermin tank 30 gal
Temperature overlap 75-79°F, pH overlap 6-8. Semi-aggressive species may stress peaceful fish.
- Dwarf Gouramimin tank 10 gal
Temperature overlap 73-82°F, pH overlap 6-7.5. Both species may compete; monitor for aggression.
- Rummy Nose Tetramin tank 10 gal
Temperature overlap 75-81°F, pH overlap 6-7. Semi-aggressive species may stress peaceful fish.
- Betta Fishmin tank 5 gal
Temperature overlap 76-82°F, pH overlap 6.5-7.5. Both species may compete; monitor for aggression.
- Guppymin tank 5 gal
Temperature overlap 73-82°F, pH overlap 6.8-7.8. Semi-aggressive species may stress peaceful fish.
- Mystery Snailmin tank 5 gal
Temperature overlap 73-82°F, pH overlap 7.2-8. Semi-aggressive species may stress peaceful fish.
- Red Hook Silver Dollarmin tank 100 gal
Temperature overlap 75-82°F, pH overlap 6-7. Semi-aggressive species may stress peaceful fish.
Avoid with
Pairings that fail the temperament, water-overlap or known-conflict checks.
High risk of conflict between semi-aggressive and aggressive species.
Oscar Fishmin tank 55 galPiranhamin tank 100 galTropheusmin tank 75 galFlowerhorn Cichlidmin tank 70 galAfrican Cichlids (Mbuna)min tank 55 gal
Check your own tank
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