O
Oscar
Astronotus ocellatus
VS
S
Siamese Algae Eater
Crossocheilus oblongus
Choosing between Oscar and Siamese Algae Eater? 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.
Oscar
Astronotus ocellatusVS
Siamese Algae Eater
Crossocheilus oblongusCommon Name
Oscar
Siamese Algae Eater
Scientific Name
Astronotus ocellatus
Crossocheilus oblongus
Type
Freshwater
Freshwater
Difficulty
Intermediate
Beginner Friendly
Temperament
Aggressive
Peaceful
Minimum Tank
75 gallons
30 gallons
Recommended Tank
125 gallons
55 gallons
Temperature
74°F - 81°F
75°F - 79°F
pH Range
6.5 - 7.5
6.5 - 7.5
Max Size
14 inches
6 inches
Lifespan
10-20 years
10-12 years
Diet
Cichlid pellets, Live foods, Frozen foods, Vegetables, Shrimp
Algae, Algae wafers, Vegetables, Flakes, Frozen foods
Oscar
✓ Good For
Siamese Algae Eater
✓ Good For
- Community tanks
- Beginners
- Schooling displays
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