Compatibility Overview
Clown Loach and Otocinclus 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 100 gallons), dense planting, and close monitoring are essential.
| Factor | Clown Loach | Otocinclus | Verdict |
|---|---|---|---|
| Temperature | 77–86°F | 72–82°F | ✅ 77–82°F |
| pH Range | 6.0–7.5 | 6.0–7.5 | ✅ 6.0–7.5 |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 12 in | 1.5 in | ❌ 8× difference |
| Min. Group | 5+ | 4+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Clown Loach — Chromobotia macracanthus
Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.
Otocinclus — Otocinclus spp.
Tiny algae-eating catfish that are peaceful with all species. Need established algae growth and biofilm; sensitive to ammonia.
Frequently Asked Questions
Can Clown Loach live with Otocinclus?
With significant caution and a larger tank. Clown Loach and Otocinclus 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 100 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Clown Loach and Otocinclus together?
A minimum of 100 gallons is recommended for keeping Clown Loach and Otocinclus together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Loach and Otocinclus?
77–82°F
Is a Clown Loach aggressive toward a Otocinclus?
Clown Loach is peaceful and Otocinclus is peaceful. Narrow temperature overlap (77–82°F) — keeping the tank at exactly 78–81°F is needed for both species.