Discus and Ember Tetra Compatibility Overview
Discus and Ember Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their ranges meet only at 82โ84ยฐF, which leaves no margin for a heater drifting or a warm room. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Discus | Ember Tetra | Verdict |
|---|---|---|---|
| Temperature | 82โ88ยฐF | 73โ84ยฐF | โ ๏ธ 82โ84ยฐF (narrow) |
| pH Range | 5.0โ7.0 | 5.5โ7.0 | โ 5.5โ7.0 |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 8 in | 0.8 in | โ 10ร difference |
| Min. Group | 5+ | 8+ | 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.
Ember Tetra โ Hyphessobrycon amandae
Tiny orange-red schooling tetra that is among the most adaptable nano fish. Peaceful with everything too small to eat them.
Frequently Asked Questions
Can Discus live with Ember Tetra?
Generally not recommended. Discus and Ember Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their ranges meet only at 82โ84ยฐF, which leaves no margin for a heater drifting or a warm room. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Discus and Ember Tetra together?
A minimum of 100 gallons is recommended for keeping Discus and Ember Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Discus and Ember Tetra?
82โ84ยฐF (narrow) โ inside Discus's 82โ88ยฐF and Ember Tetra's 73โ84ยฐF.
Is a Discus aggressive toward a Ember Tetra?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Discus and Ember Tetra
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. |