B
Black Ghost Knife Fish
Apteronotus albifrons
VS
G
Guppy
Poecilia reticulata
Choosing between Black Ghost Knife Fish and Guppy? Both are excellent choices, but they have different care requirements and temperaments. Use the detailed comparison below to make an informed decision based on your experience level, tank size, and community goals.
Black Ghost Knife Fish
Apteronotus albifronsVS
Guppy
Poecilia reticulataCommon Name
Black Ghost Knife Fish
Guppy
Scientific Name
Apteronotus albifrons
Poecilia reticulata
Type
Freshwater
Freshwater
Difficulty
Advanced
Beginner Friendly
Temperament
Semi-Aggressive
Peaceful
Minimum Tank
75 gallons
5 gallons
Recommended Tank
100 gallons
10 gallons
Temperature
73°F - 80°F
72°F - 82°F
pH Range
6 - 8
6.8 - 7.8
Max Size
20 inches
2.5 inches
Lifespan
10-15 years
1-3 years
Diet
Live or frozen bloodworms, Krill, Pellets, Small fish
Flakes, Pellets, Frozen foods, Vegetables
Black Ghost Knife Fish
✓ Good For
Guppy
✓ Good For
- Community tanks
- Beginners
- Small tanks
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