Compatibility Overview
Diamond Tetra and Neon Tetra 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 30-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Diamond Tetra | Neon Tetra | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 72–80°F | ✅ 72–80°F |
| pH Range | 6.0–7.5 | 6.0–7.5 | ✅ 6.0–7.5 |
| Temperament | semi | peaceful | ⚠️ Monitor |
| Adult Size | 1.2 in | 1.5 in | ✅ Similar |
| Min. Group | 6+ | 6+ | See below |
| Min. Tank Size | 30 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
Neon Tetra — Paracheirodon innesi
Iconic schooling fish with vivid electric-blue and red stripes. Hardy in captivity; suitable for most peaceful community setups.
Frequently Asked Questions
Can Diamond Tetra live with Neon Tetra?
Yes, in a well-planned setup. Diamond Tetra and Neon Tetra 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 30-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Diamond Tetra and Neon Tetra together?
A minimum of 30 gallons is recommended for keeping Diamond Tetra and Neon Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Diamond Tetra and Neon Tetra?
72–80°F
Is a Diamond Tetra aggressive toward a Neon Tetra?
Diamond Tetra is semi and Neon Tetra is peaceful. 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 | 75/100 |
| Adult Size | 100/100 |
| Swim Zone | 68/100 |
| Social Needs | 85/100 |
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 | 30 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 | 75 gal | Best when keeping larger schools or reducing territorial pressure. |