Diamond Tetra and Discus Compatibility Overview
Diamond 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 | Diamond Tetra | Discus | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 82โ88ยฐF | โ ๏ธ 82โ82ยฐF (narrow) |
| pH Range | 5.5โ7.0 | 5.0โ7.0 | โ 5.5โ7.0 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 2.4 in | 8 in | โ ๏ธ 3.3ร difference |
| Min. Group | 6+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Diamond Tetra โ Moenkhausia pittieri
The Diamond Tetra is a popular freshwater fish known for its vibrant colors and peaceful nature. It is well-suited for community tanks and can thrive in a variety of water conditions. With a moderate activity level and a preference for schools, this species is a great addition to any beginner or intermediate aquarist's tank.
โ Full Diamond 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 Diamond Tetra live with Discus?
Generally not recommended. Diamond 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 Diamond Tetra and Discus together?
A minimum of 100 gallons is recommended for keeping Diamond Tetra and Discus together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Diamond Tetra and Discus?
82โ82ยฐF (narrow) โ inside Diamond Tetra's 75โ82ยฐF and Discus's 82โ88ยฐF.
Is a Diamond Tetra aggressive toward a Discus?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Diamond 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. |