Discus and Giant Danio Compatibility Overview
Discus and Giant Danio are generally not recommended to be housed together. There is no shared temperature: Discus needs 82โ88ยฐF and Giant Danio needs 72โ81ยฐF. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Discus | Giant Danio | Verdict |
|---|---|---|---|
| Temperature | 82โ88ยฐF | 72โ81ยฐF | โ No overlap |
| pH Range | 5.0โ7.0 | 6.5โ7.5 | โ ๏ธ 6.5โ7.0 (narrow) |
| Temperament | semi | semi | โ ๏ธ Monitor |
| Adult Size | 8 in | 4.0 in | โ ๏ธ 2.0ร difference |
| Min. Group | 5+ | 6+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Discus โ Symphysodon spp.
The 'king of the aquarium' โ beautiful but demanding. Requires very warm, soft, acidic water that excludes most community fish.
Giant Danio โ Devario aequipinnatus
The Giant Danio is a vibrant and peaceful addition to the freshwater aquarium. Known for its striking red and blue colors, it is a popular choice for beginners and experienced aquarists alike. These fish are relatively easy to care for and can thrive in a well-maintained tank.
Frequently Asked Questions
Can Discus live with Giant Danio?
Generally not recommended. Discus and Giant Danio are generally not recommended to be housed together. There is no shared temperature: Discus needs 82โ88ยฐF and Giant Danio needs 72โ81ยฐF. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Discus and Giant Danio together?
A minimum of 100 gallons is recommended for keeping Discus and Giant Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Discus and Giant Danio?
There is no safe shared range: Discus needs 82โ88ยฐF and Giant Danio needs 72โ81ยฐF.
Is a Discus aggressive toward a Giant Danio?
Discus is semi and Giant Danio is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Discus and Giant Danio
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |