Compatibility Overview
Bosemans Rainbowfish and Chili Rasbora can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 40-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Bosemans Rainbowfish | Chili Rasbora | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 68–82°F | ✅ 72–82°F |
| pH Range | 6.5–7.5 | 4.0–7.0 | ⚠️ 6.5–7.0 (narrow) |
| Temperament | semi | peaceful | ⚠️ Monitor |
| Adult Size | 2.0 in | 0.8 in | ⚠️ 2.5× difference |
| Min. Group | 1+ | 8+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Bosemans Rainbowfish — Aquarium species
Boeseman's Rainbowfish is a popular freshwater species known for its vibrant colors and peaceful nature. They require a spacious tank and a well-maintained water quality to thrive. These fish are suitable for beginners and can be kept in a community tank with other peaceful species.
→ Full Bosemans Rainbowfish care guide
Chili Rasbora — Boraras brigittae
Vivid red nano fish from Borneo blackwater habitats. Extremely small — only safe with fish too small to swallow them.
Frequently Asked Questions
Can Bosemans Rainbowfish live with Chili Rasbora?
Yes, in a well-planned setup. Bosemans Rainbowfish and Chili Rasbora can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 40-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Bosemans Rainbowfish and Chili Rasbora together?
A minimum of 40 gallons is recommended for keeping Bosemans Rainbowfish and Chili Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Bosemans Rainbowfish and Chili Rasbora?
72–82°F
Is a Bosemans Rainbowfish aggressive toward a Chili Rasbora?
Bosemans Rainbowfish is semi and Chili Rasbora is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 100/100 |
| Ph | 50/100 |
| Temperament | 75/100 |
| Adult Size | 72/100 |
| Swim Zone | 68/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 40 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 55 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 90 gal | Best when keeping larger schools or reducing territorial pressure. |