Compatibility Overview
Green Terror Cichlid and Peacock Cichlid can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 40 gallons), dense planting, and close monitoring are essential.
| Factor | Green Terror Cichlid | Peacock Cichlid | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 75–81°F | ✅ 75–81°F |
| pH Range | 6.0–8.0 | 7.5–8.5 | ⚠️ 7.5–8.0 (narrow) |
| Temperament | aggressive | aggressive | ❌ Risk |
| Adult Size | 3.9 in | 3.1 in | ✅ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Green Terror Cichlid — Aquarium species
The Green Terror Cichlid is a popular choice for experienced aquarists due to its striking appearance and vibrant colors. They are known for their aggression and should be kept in a species-specific tank. Their tall, laterally compressed bodies and vivid coloration make them visually appealing but require careful handling due to their potentially aggressive
→ Full Green Terror Cichlid care guide
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.
Frequently Asked Questions
Can Green Terror Cichlid live with Peacock Cichlid?
With significant caution and a larger tank. Green Terror Cichlid and Peacock Cichlid can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 40 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Green Terror Cichlid and Peacock Cichlid together?
A minimum of 40 gallons is recommended for keeping Green Terror Cichlid and Peacock Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Green Terror Cichlid and Peacock Cichlid?
75–81°F
Is a Green Terror Cichlid aggressive toward a Peacock Cichlid?
Green Terror Cichlid is aggressive and Peacock Cichlid is aggressive. No major aggression issues are expected between these species.
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 | 50/100 |
| Temperament | 12/100 |
| 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 | 53 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 100 gal | Best when keeping larger schools or reducing territorial pressure. |