Glass Catfish and Guppy Compatibility Overview
Glass Catfish and Guppy can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 20 gallons), dense planting, and close monitoring are essential.
| Factor | Glass Catfish | Guppy | Verdict |
|---|---|---|---|
| Temperature | 68โ79ยฐF | 72โ82ยฐF | โ 72โ79ยฐF |
| pH Range | 4.0โ7.0 | 6.8โ8.5 | โ ๏ธ 6.8โ7.0 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.6 in | 2.5 in | โ Similar |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 20 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
Guppy โ Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
Frequently Asked Questions
Can Glass Catfish live with Guppy?
With significant caution and a larger tank. Glass Catfish and Guppy can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 20 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Glass Catfish and Guppy together?
A minimum of 20 gallons is recommended for keeping Glass Catfish and Guppy together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Glass Catfish and Guppy?
72โ79ยฐF โ inside Glass Catfish's 68โ79ยฐF and Guppy's 72โ82ยฐF.
Is a Glass Catfish aggressive toward a Guppy?
Glass Catfish is peaceful and Guppy is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Glass Catfish and Guppy
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 21 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 | 55 gal | Best when keeping larger schools or reducing territorial pressure. |