Compatibility Overview
Otocinclus and Pygmy Corydoras 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 30-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Otocinclus | Pygmy Corydoras | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 72–79°F | ✅ 72–79°F |
| pH Range | 6.0–7.5 | 6.0–7.5 | ✅ 6.0–7.5 |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 1.5 in | 1 in | ✅ Similar |
| Min. Group | 4+ | 6+ | See below |
| Min. Tank Size | 30 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Otocinclus — Otocinclus spp.
Tiny algae-eating catfish that are peaceful with all species. Need established algae growth and biofilm; sensitive to ammonia.
Pygmy Corydoras — Corydoras pygmaeus
Tiny armoured catfish that school in open water as well as on the substrate. Peaceful with all non-aggressive species.
Frequently Asked Questions
Can Otocinclus live with Pygmy Corydoras?
Yes, in a well-planned setup. Otocinclus and Pygmy Corydoras 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 30-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Otocinclus and Pygmy Corydoras together?
A minimum of 30 gallons is recommended for keeping Otocinclus and Pygmy Corydoras together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Otocinclus and Pygmy Corydoras?
72–79°F
Is a Otocinclus aggressive toward a Pygmy Corydoras?
Otocinclus is peaceful and Pygmy Corydoras is peaceful. No major aggression issues are expected between these species.