Compatibility Overview
Neon Rainbowfish and Serpae 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 15-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Neon Rainbowfish | Serpae Tetra | Verdict |
|---|---|---|---|
| Temperature | 72–79°F | 72–82°F | ✅ 72–79°F |
| pH Range | 6.5–7.5 | 6.0–7.0 | ⚠️ 6.5–7.0 (narrow) |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 1.6 in | 1.6 in | ✅ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 15 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Neon Rainbowfish — Aquarium species
The Neon Rainbowfish, known for its vibrant colors, is a popular addition to freshwater aquariums. These fish are generally peaceful and can be kept in community tanks with other peaceful species. They require a well-maintained tank with a good water flow and plenty of swimming space. Regular water changes and a balanced diet are essential for their health.
→ Full Neon Rainbowfish care guide
Serpae Tetra — Aquarium species
The Serpae Tetra is a popular freshwater fish known for its vibrant coloration and peaceful nature. It is well-suited for community tanks and can be a great addition to any aquarium. With its moderate activity level and easy care requirements, it is a suitable choice for beginners and experienced aquarists alike.
Frequently Asked Questions
Can Neon Rainbowfish live with Serpae Tetra?
Yes, in a well-planned setup. Neon Rainbowfish and Serpae 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 15-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Neon Rainbowfish and Serpae Tetra together?
A minimum of 15 gallons is recommended for keeping Neon Rainbowfish and Serpae Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Neon Rainbowfish and Serpae Tetra?
72–79°F
Is a Neon Rainbowfish aggressive toward a Serpae Tetra?
Neon Rainbowfish is semi and Serpae Tetra 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 | 50/100 |
| Temperament | 62/100 |
| 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 | 15 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 29 gal | Best when keeping larger schools or reducing territorial pressure. |