Discus and Hillstream Loach Compatibility Overview
Discus and Hillstream Loach are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. There is no shared temperature: Discus needs 82โ88ยฐF and Hillstream Loach needs 68โ75ยฐF. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Discus | Hillstream Loach | Verdict |
|---|---|---|---|
| Temperature | 82โ88ยฐF | 68โ75ยฐF | โ No overlap |
| pH Range | 5.0โ7.0 | 6.0โ7.5 | โ 6.0โ7.0 |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 8 in | 2.6 in | โ ๏ธ 3.1ร difference |
| Min. Group | 5+ | 4+ | 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.
Hillstream Loach โ Sewellia lineolata
Sewellia lineolata, known as the Hillstream Loach, is a fascinating species for aquarists. These fish require a well-oxygenated, clear water environment with plenty of hiding spots. With a lifespan of 7 years, they are a long-term commitment. Their olive green color and slender body shape add a unique aesthetic to the tank.
Frequently Asked Questions
Can Discus live with Hillstream Loach?
Generally not recommended. Discus and Hillstream Loach are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. There is no shared temperature: Discus needs 82โ88ยฐF and Hillstream Loach needs 68โ75ยฐF. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Discus and Hillstream Loach together?
A minimum of 100 gallons is recommended for keeping Discus and Hillstream Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Discus and Hillstream Loach?
There is no safe shared range: Discus needs 82โ88ยฐF and Hillstream Loach needs 68โ75ยฐF.
Is a Discus aggressive toward a Hillstream Loach?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Discus and Hillstream Loach
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. |