Chili Rasbora and Discus Compatibility Overview
Chili Rasbora 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 | Chili Rasbora | Discus | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 82โ88ยฐF | โ ๏ธ 82โ82ยฐF (narrow) |
| pH Range | 4.0โ7.0 | 5.0โ7.0 | โ 5.0โ7.0 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 0.8 in | 8 in | โ 10ร difference |
| Min. Group | 8+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Chili Rasbora โ Boraras brigittae
Vivid red nano fish from Borneo blackwater habitats. Extremely small โ only safe with fish too small to swallow them.
โ Full Chili Rasbora 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 Chili Rasbora live with Discus?
Generally not recommended. Chili Rasbora 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 Chili Rasbora and Discus together?
A minimum of 100 gallons is recommended for keeping Chili Rasbora and Discus together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Chili Rasbora and Discus?
82โ82ยฐF (narrow) โ inside Chili Rasbora's 68โ82ยฐF and Discus's 82โ88ยฐF.
Is a Chili Rasbora aggressive toward a Discus?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Chili Rasbora 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. |