Black Phantom Tetra and Discus Compatibility Overview
Black Phantom Tetra and Discus are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their ranges meet only at 82โ82ยฐF, 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 | Black Phantom Tetra | Discus | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 82โ88ยฐF | โ ๏ธ 82โ82ยฐF (narrow) |
| pH Range | 5.0โ7.0 | 5.0โ7.0 | โ 5.0โ7.0 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.4 in | 8 in | โ 6ร difference |
| Min. Group | 8+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Black Phantom Tetra โ Hyphessobrycon megalopterus
The Black Phantom Tetra is a popular freshwater fish known for its striking black and silver coloration. It is generally peaceful and can be kept in a community tank with other non-aggressive species. They require a well-maintained tank with a moderate water flow and a good cover of plants.
โ Full Black Phantom Tetra care guide
Discus โ Symphysodon spp.
The 'king of the aquarium' โ beautiful but demanding. Requires very warm, soft, acidic water that excludes most community fish.
Frequently Asked Questions
Can Black Phantom Tetra live with Discus?
Generally not recommended. Black Phantom Tetra and Discus are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their ranges meet only at 82โ82ยฐF, 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 Black Phantom Tetra and Discus together?
A minimum of 100 gallons is recommended for keeping Black Phantom Tetra and Discus together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Black Phantom Tetra and Discus?
82โ82ยฐF (narrow) โ inside Black Phantom Tetra's 68โ82ยฐF and Discus's 82โ88ยฐF.
Is a Black Phantom Tetra aggressive toward a Discus?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Black Phantom Tetra and Discus
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. |