Compatibility Overview
Diamond Tetra and Frontosa Cichlid 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 | Diamond Tetra | Frontosa Cichlid | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 75–82°F | ✅ 75–82°F |
| pH Range | 6.0–7.5 | 7.0–8.0 | ⚠️ 7.0–7.5 (narrow) |
| Temperament | semi | aggressive | ❌ Risk |
| Adult Size | 1.2 in | 3.9 in | ⚠️ 3.2× difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
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
Frontosa Cichlid — Aquarium species
The Frontosa Cichlid is a popular aquarium fish known for its vibrant colors and peaceful demeanor. They are suitable for beginners and can thrive in a well-maintained community tank. Providing ample space and avoiding overcrowding is essential for their well-being.
Frequently Asked Questions
Can Diamond Tetra live with Frontosa Cichlid?
Generally not recommended. Diamond Tetra and Frontosa Cichlid 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 Diamond Tetra and Frontosa Cichlid together?
A minimum of 55 gallons is recommended for keeping Diamond Tetra and Frontosa Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Diamond Tetra and Frontosa Cichlid?
75–82°F
Is a Diamond Tetra aggressive toward a Frontosa Cichlid?
Diamond Tetra is semi and Frontosa Cichlid is aggressive. The adult size gap creates a meaningful predation risk.
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 | 25/100 |
| Adult Size | 38/100 |
| 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 | 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. |