Cardinal Tetra and Peacock Cichlid Compatibility Overview
Cardinal Tetra and Peacock Cichlid are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges do not meet: Cardinal Tetra wants 4.5โ7.0 and Peacock Cichlid wants 7.5โ9.0. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Cardinal Tetra | Peacock Cichlid | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 73โ84ยฐF | โ 73โ82ยฐF |
| pH Range | 4.5โ7.0 | 7.5โ9.0 | โ No overlap |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.5 in | 5.1 in | โ ๏ธ 3.4ร difference |
| Min. Group | 6+ | 4+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Cardinal Tetra โ Paracheirodon axelrodi
Brilliant red-and-blue schooling fish from the Rio Negro. Prefers soft, acidic, warm water โ a natural companion for discus.
โ Full Cardinal Tetra care guide
Peacock Cichlid โ Aulonocara stuartgranti
The Peacock Cichlid, Aulonocara nyassae, is a stunning fish with vibrant blue and yellow colors. These fish are known for their aggression and require a mature and well-maintained tank. They are best kept in pairs or in a species-specific tank. Careful attention must be given to water parameters and tank setup to ensure their health and well-being.
Frequently Asked Questions
Can Cardinal Tetra live with Peacock Cichlid?
Generally not recommended. Cardinal Tetra and Peacock Cichlid are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges do not meet: Cardinal Tetra wants 4.5โ7.0 and Peacock Cichlid wants 7.5โ9.0. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Cardinal Tetra and Peacock Cichlid together?
A minimum of 75 gallons is recommended for keeping Cardinal Tetra and Peacock Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Peacock Cichlid?
73โ82ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Peacock Cichlid's 73โ84ยฐF.
Is a Cardinal Tetra aggressive toward a Peacock Cichlid?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Peacock Cichlid
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |