Can Cardinal Tetra Live With Flowerhorn?

Cardinal Tetra and Flowerhorn are NOT compatible tank mates.

Detailed Analysis

Temperature ✓ Compatible

Good temperature overlap at 78–84°F.

pH ✓ Compatible

Good pH overlap at 6.5–7.0.

Size ✗ Not Compatible

Extreme size difference. Flowerhorn (12") may eat or bully Cardinal Tetra (2").

Temperament ✗ Not Compatible

Cardinal Tetra (peaceful) is not compatible with Flowerhorn (aggressive). Aggression or stress is very likely.

Swim Level ⚠ Use Caution

Both fish occupy the middle level and Flowerhorn is territorial. Provide plenty of space and hiding spots.

Trait Conflict ✗ Not Compatible

Flowerhorn is a predator and may eat 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: 55 gallons

ParameterCardinal TetraFlowerhorn
Temperature73–84°F78–86°F
pH5–76.5–7.5
Max Size2"12"
TemperamentPeacefulAggressive
Swim LevelMiddleMiddle
Min Tank10 gal55 gal

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