Compatibility Overview
Corydoras Catfish and Green Terror Cichlid can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Corydoras Catfish | Green Terror Cichlid | Verdict |
|---|---|---|---|
| Temperature | 70–79°F | 72–82°F | ✅ 72–79°F |
| pH Range | 6.0–8.0 | 6.0–8.0 | ✅ 6.0–8.0 |
| Temperament | peaceful | aggressive | ❌ Risk |
| Adult Size | 2.5 in | 3.9 in | ✅ Similar |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Corydoras Catfish — Corydoras spp.
Armoured bottom-dwelling catfish that are peaceful with all non-aggressive species. Need fine sand substrate to protect delicate barbels.
→ Full Corydoras Catfish care guide
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
Frequently Asked Questions
Can Corydoras Catfish live with Green Terror Cichlid?
Yes, in a well-planned setup. Corydoras Catfish and Green Terror Cichlid can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Corydoras Catfish and Green Terror Cichlid together?
A minimum of 55 gallons is recommended for keeping Corydoras Catfish and Green Terror Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Corydoras Catfish and Green Terror Cichlid?
72–79°F
Is a Corydoras Catfish aggressive toward a Green Terror Cichlid?
Corydoras Catfish is peaceful and Green Terror 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 | 78/100 |
| Ph | 100/100 |
| Temperament | 30/100 |
| Adult Size | 100/100 |
| Swim Zone | 92/100 |
| 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 | 55 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 | 125 gal | Best when keeping larger schools or reducing territorial pressure. |