Silver Dollar and Swordtail Compatibility Overview
Silver Dollar and Swordtail can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
| Factor | Silver Dollar | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 65โ80ยฐF | โ 75โ80ยฐF |
| pH Range | 6.0โ7.0 | 7.0โ8.3 | โ ๏ธ 7.0โ7.0 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 5.9 in | 5 in | โ Similar |
| Min. Group | 5+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Silver Dollar โ Metynnis argenteus
The Metynnis argenteus, known as the Silver Dollar fish, is a popular freshwater species with a distinctive silver color and disc-shaped body. They require a spacious tank and are best kept in groups to prevent bullying. Their peaceful nature makes them suitable for community tanks, but they are not known to school.
โ Full Silver Dollar 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 Silver Dollar live with Swordtail?
With significant caution and a larger tank. Silver Dollar and Swordtail can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Silver Dollar and Swordtail together?
A minimum of 75 gallons is recommended for keeping Silver Dollar and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Silver Dollar and Swordtail?
75โ80ยฐF โ inside Silver Dollar's 75โ82ยฐF and Swordtail's 65โ80ยฐF.
Is a Silver Dollar aggressive toward a Swordtail?
Silver Dollar is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Silver Dollar 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. |