Compatibility Overview
Bristlenose Pleco and Chili Rasbora 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 75 gallons), dense planting, and close monitoring are essential.
| Factor | Bristlenose Pleco | Chili Rasbora | Verdict |
|---|---|---|---|
| Temperature | 60–80°F | 68–82°F | ✅ 68–80°F |
| pH Range | 6.5–7.5 | 4.0–7.0 | ⚠️ 6.5–7.0 (narrow) |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 5 in | 0.8 in | ❌ 6× difference |
| Min. Group | 1+ | 8+ | See below |
| Min. Tank Size | 75 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Bristlenose Pleco — Ancistrus sp.
Hardy armoured catfish that grazes on algae. Peaceful with virtually all species; tolerates a wide temperature range.
→ Full Bristlenose Pleco 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 Bristlenose Pleco live with Chili Rasbora?
With significant caution and a larger tank. Bristlenose Pleco and Chili Rasbora 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 75 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Bristlenose Pleco and Chili Rasbora together?
A minimum of 75 gallons is recommended for keeping Bristlenose Pleco and Chili Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Bristlenose Pleco and Chili Rasbora?
68–80°F
Is a Bristlenose Pleco aggressive toward a Chili Rasbora?
Bristlenose Pleco is peaceful and Chili Rasbora is peaceful. Limited pH overlap (6.5–7.0) — maintain pH carefully within this narrow window.