Compatibility Overview
Chili Rasbora and Pea Puffer can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 40 gallons), dense planting, and close monitoring are essential.
| Factor | Chili Rasbora | Pea Puffer | Verdict |
|---|---|---|---|
| Temperature | 68–82°F | 74–82°F | ✅ 74–82°F |
| pH Range | 4.0–7.0 | 7.0–8.0 | ⚠️ 7.0–7.0 (narrow) |
| Temperament | peaceful | semi | ⚠️ Monitor |
| Adult Size | 0.8 in | 1 in | ✅ Similar |
| Min. Group | 8+ | 1+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Chili Rasbora — Boraras brigittae
Vivid red nano fish from Borneo blackwater habitats. Extremely small — only safe with fish too small to swallow them.
→ Full Chili Rasbora care guide
Pea Puffer — Carinotetraodon travancoricus
World's smallest pufferfish — intensely territorial and nippy despite tiny size. Will attack fins and eat shrimp and snails.
Frequently Asked Questions
Can Chili Rasbora live with Pea Puffer?
With significant caution and a larger tank. Chili Rasbora and Pea Puffer can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 40 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Chili Rasbora and Pea Puffer together?
A minimum of 40 gallons is recommended for keeping Chili Rasbora and Pea Puffer together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Chili Rasbora and Pea Puffer?
74–82°F
Is a Chili Rasbora aggressive toward a Pea Puffer?
Chili Rasbora is peaceful and Pea Puffer is semi. pH ranges barely or do not overlap: Chili Rasbora prefers 4.0–7.0; Pea Puffer prefers 7.0–8.0.