Peacock Cichlid and Threadfin Rainbowfish Compatibility Overview
Peacock Cichlid and Threadfin Rainbowfish are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Peacock Cichlid | Threadfin Rainbowfish | Verdict |
|---|---|---|---|
| Temperature | 73โ84ยฐF | 72โ86ยฐF | โ 73โ84ยฐF |
| pH Range | 7.5โ9.0 | 5.0โ8.0 | โ ๏ธ 7.5โ8.0 (narrow) |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 5.1 in | 1.6 in | โ ๏ธ 3.2ร difference |
| Min. Group | 4+ | 6+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
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.
โ Full Peacock Cichlid care guide
Threadfin Rainbowfish โ Iriatherina werneri
The Threadfin Rainbowfish is a popular choice for freshwater aquariums due to its vibrant colors and peaceful nature. It requires a well-maintained tank with plenty of swimming space and a moderate water flow. These fish are not known to be aggressive and can be kept in community tanks with other peaceful species.
Frequently Asked Questions
Can Peacock Cichlid live with Threadfin Rainbowfish?
Generally not recommended. Peacock Cichlid and Threadfin Rainbowfish are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Peacock Cichlid and Threadfin Rainbowfish together?
A minimum of 75 gallons is recommended for keeping Peacock Cichlid and Threadfin Rainbowfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Peacock Cichlid and Threadfin Rainbowfish?
73โ84ยฐF โ inside Peacock Cichlid's 73โ84ยฐF and Threadfin Rainbowfish's 72โ86ยฐF.
Is a Peacock Cichlid aggressive toward a Threadfin Rainbowfish?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Peacock Cichlid and Threadfin Rainbowfish
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. |