Compatibility Overview
Diamond Tetra and Severum 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 40-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Diamond Tetra | Severum Cichlid | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 75–82°F | ✅ 75–82°F |
| pH Range | 6.0–7.5 | 6.0–7.5 | ✅ 6.0–7.5 |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 1.2 in | 2.4 in | ⚠️ 2.0× difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Diamond Tetra — Aquarium species
The Diamond Tetra is a popular freshwater fish known for its vibrant colors and peaceful nature. It is well-suited for community tanks and can thrive in a variety of water conditions. With a moderate activity level and a preference for schools, this species is a great addition to any beginner or intermediate aquarist's tank.
→ Full Diamond Tetra care guide
Severum Cichlid — Aquarium species
The Severum Cichlid, known for its vibrant colors and peaceful nature, is a popular choice for freshwater aquariums. They have a lifespan of around 5 years and require a minimum tank size of 80 liters. These fish are not schooling fish but are known to be gentle and compatible with a variety of tank mates. Their tall, laterally compressed body shape makes th
Frequently Asked Questions
Can Diamond Tetra live with Severum Cichlid?
Yes, in a well-planned setup. Diamond Tetra and Severum 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 40-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Diamond Tetra and Severum Cichlid together?
A minimum of 40 gallons is recommended for keeping Diamond Tetra and Severum Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Diamond Tetra and Severum Cichlid?
75–82°F
Is a Diamond Tetra aggressive toward a Severum Cichlid?
Diamond Tetra is semi and Severum Cichlid is semi. 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 | 100/100 |
| Temperament | 62/100 |
| Adult Size | 72/100 |
| 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 | 40 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 55 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 90 gal | Best when keeping larger schools or reducing territorial pressure. |