Discus and Firefish Goby Compatibility Overview
Discus and Firefish Goby are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. 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 | Discus | Firefish Goby | Verdict |
|---|---|---|---|
| Temperature | 82โ88ยฐF | 72โ82ยฐF | โ ๏ธ 82โ82ยฐF (narrow) |
| pH Range | 5.0โ7.0 | 8.1โ8.4 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 8 in | 3.0 in | โ ๏ธ 2.7ร difference |
| Min. Group | 5+ | 1+ | 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.
Firefish Goby โ Nemateleotris magnifica
The Firefish Goby is a popular choice for saltwater aquariums due to its vibrant colors and peaceful nature. These goby fish thrive in well-maintained tanks with plenty of live rock for them to explore. They are best kept in pairs or small groups and can be a great addition to a community tank with compatible species.
Frequently Asked Questions
Can Discus live with Firefish Goby?
Generally not recommended. Discus and Firefish Goby are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. 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 Discus and Firefish Goby together?
A minimum of 100 gallons is recommended for keeping Discus and Firefish Goby together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Discus and Firefish Goby?
82โ82ยฐF (narrow) โ inside Discus's 82โ88ยฐF and Firefish Goby's 72โ82ยฐF.
Is a Discus aggressive toward a Firefish Goby?
Discus is semi and Firefish Goby is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Discus and Firefish Goby
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. |