Compatibility Overview
Glass Catfish and Pearl Danio can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Glass Catfish | Pearl Danio | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 72–82°F | ✅ 72–82°F |
| pH Range | 6.5–7.5 | 6.5–7.5 | ✅ 6.5–7.5 |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 3.9 in | 1.6 in | ⚠️ 2.4× difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Glass Catfish — Aquarium species
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. They are sensit
→ Full Glass Catfish care guide
Pearl Danio — Aquarium species
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.
Frequently Asked Questions
Can Glass Catfish live with Pearl Danio?
Yes, in a well-planned setup. Glass Catfish and Pearl Danio can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Glass Catfish and Pearl Danio together?
A minimum of 55 gallons is recommended for keeping Glass Catfish and Pearl Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Glass Catfish and Pearl Danio?
72–82°F
Is a Glass Catfish aggressive toward a Pearl Danio?
Glass Catfish is semi and Pearl Danio is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 100/100 |
| Ph | 100/100 |
| Temperament | 62/100 |
| Adult Size | 72/100 |
| Swim Zone | 92/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |