Neon Tetra and Swordtail Compatibility Overview
Neon Tetra and Swordtail can potentially coexist, but the combination requires careful attention. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
| Factor | Neon Tetra | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 72โ80ยฐF | 65โ80ยฐF | โ 72โ80ยฐF |
| pH Range | 6.0โ7.5 | 7.0โ8.3 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 5 in | โ ๏ธ 3.3ร difference |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Neon Tetra โ Paracheirodon innesi
Iconic schooling fish with vivid electric-blue and red stripes. Hardy in captivity; suitable for most peaceful community setups.
โ Full Neon Tetra care guide
Swordtail โ Xiphophorus hellerii
Hardy livebearer with a distinctive elongated lower tail fin in males. Peaceful community fish that tolerate a wide temperature range.
Frequently Asked Questions
Can Neon Tetra live with Swordtail?
With significant caution and a larger tank. Neon Tetra and Swordtail can potentially coexist, but the combination requires careful attention. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Neon Tetra and Swordtail together?
A minimum of 75 gallons is recommended for keeping Neon Tetra and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Neon Tetra and Swordtail?
72โ80ยฐF โ inside Neon Tetra's 72โ80ยฐF and Swordtail's 65โ80ยฐF.
Is a Neon Tetra aggressive toward a Swordtail?
Neon Tetra is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Neon Tetra and Swordtail
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |