Pearl Danio and Swordtail Compatibility Overview
Pearl Danio and Swordtail can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 75-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Pearl Danio | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 72โ79ยฐF | 65โ80ยฐF | โ 72โ79ยฐF |
| pH Range | 6.5โ7.5 | 7.0โ8.3 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.5 in | 5 in | โ ๏ธ 2.0ร difference |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Pearl Danio โ Danio albolineatus
The Pearl Danio is a popular freshwater fish known for its shimmering blue and white colors. It is a peaceful community fish that can be kept in a tank with other peaceful species. These fish are moderately active and do not require a large tank. They are suitable for beginners due to their hardiness and ease of care.
โ Full Pearl Danio 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 Pearl Danio live with Swordtail?
Yes, in a well-planned setup. Pearl Danio and Swordtail can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 75-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Pearl Danio and Swordtail together?
A minimum of 75 gallons is recommended for keeping Pearl Danio and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Pearl Danio and Swordtail?
72โ79ยฐF โ inside Pearl Danio's 72โ79ยฐF and Swordtail's 65โ80ยฐF.
Is a Pearl Danio aggressive toward a Swordtail?
Pearl Danio is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Pearl Danio 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. |