Glass Catfish and Swordtail Compatibility Overview
Glass Catfish 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 | Glass Catfish | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 68โ79ยฐF | 65โ80ยฐF | โ 68โ79ยฐF |
| pH Range | 4.0โ7.0 | 7.0โ8.3 | โ ๏ธ 7.0โ7.0 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.6 in | 5 in | โ Similar |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Glass Catfish โ Kryptopterus vitreolus
The Glass Catfish, Kryptopterus vitreolus, is a popular freshwater aquarium fish known for its unique, translucent body and iridescent scales. It is a peaceful species that thrives in groups and is suitable for beginners due to its hardy nature. These catfish are bottom-dwellers and require a well-decorated tank with plenty of swimming space.
โ Full Glass Catfish 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 Glass Catfish live with Swordtail?
With significant caution and a larger tank. Glass Catfish 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 Glass Catfish and Swordtail together?
A minimum of 75 gallons is recommended for keeping Glass Catfish and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Glass Catfish and Swordtail?
68โ79ยฐF โ inside Glass Catfish's 68โ79ยฐF and Swordtail's 65โ80ยฐF.
Is a Glass Catfish aggressive toward a Swordtail?
Glass Catfish is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Glass Catfish 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. |