Compatibility Overview
Peacock Cichlid and Royal Gramma are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Peacock Cichlid | Royal Gramma | Verdict |
|---|---|---|---|
| Temperature | 75–81°F | 73–81°F | ✅ 75–81°F |
| pH Range | 7.5–8.5 | 8.0–8.5 | ⚠️ 8.0–8.5 (narrow) |
| Temperament | aggressive | semi | ❌ Risk |
| Adult Size | 3.1 in | 1.6 in | ✅ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 29 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Peacock Cichlid — Aquarium species
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.
→ Full Peacock Cichlid care guide
Royal Gramma — Aquarium species
The Royal Gramma, known for its vibrant blue coloration, is a popular saltwater fish among beginners and experienced aquarists alike. It requires a well-maintained tank with plenty of swimming space and a moderate current. With a peaceful temperament and a relatively easy care routine, the Royal Gramma can be a great addition to a community tank. Its delicat
Frequently Asked Questions
Can Peacock Cichlid live with Royal Gramma?
Generally not recommended. Peacock Cichlid and Royal Gramma are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Peacock Cichlid and Royal Gramma together?
A minimum of 29 gallons is recommended for keeping Peacock Cichlid and Royal Gramma together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Peacock Cichlid and Royal Gramma?
75–81°F
Is a Peacock Cichlid aggressive toward a Royal Gramma?
Peacock Cichlid is aggressive and Royal Gramma is semi. These animals require different water types and cannot share one aquarium.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 100/100 |
| Ph | 100/100 |
| Temperament | 25/100 |
| Adult Size | 100/100 |
| Swim Zone | 68/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 29 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 40 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |