Otocinclus and Peacock Cichlid Compatibility Overview
Otocinclus and Peacock Cichlid are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their usable pH overlap is narrow and requires stable, tested water. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Otocinclus | Peacock Cichlid | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 73โ84ยฐF | โ 73โ82ยฐF |
| pH Range | 6.0โ7.5 | 7.5โ9.0 | โ ๏ธ 7.5โ7.5 (narrow) |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.5 in | 5.1 in | โ ๏ธ 3.4ร difference |
| Min. Group | 4+ | 4+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Otocinclus โ Otocinclus spp.
Tiny algae-eating catfish that are peaceful with all species. Need established algae growth and biofilm; sensitive to ammonia.
โ Full Otocinclus 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 Otocinclus live with Peacock Cichlid?
Generally not recommended. Otocinclus and Peacock Cichlid are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their usable pH overlap is narrow and requires stable, tested water. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Otocinclus and Peacock Cichlid together?
A minimum of 55 gallons is recommended for keeping Otocinclus and Peacock Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Otocinclus and Peacock Cichlid?
73โ82ยฐF โ inside Otocinclus's 72โ82ยฐF and Peacock Cichlid's 73โ84ยฐF.
Is a Otocinclus aggressive toward a Peacock Cichlid?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Otocinclus 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 | 64 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 90 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |