Otocinclus and Pygmy Corydoras Compatibility Overview
Otocinclus and Pygmy Corydoras can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Otocinclus | Pygmy Corydoras | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ7.5 | 6.0โ7.5 | โ 6.0โ7.5 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 1 in | โ Similar |
| Min. Group | 4+ | 6+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Otocinclus โ Otocinclus spp.
Tiny algae-eating catfish that are peaceful with all species. Need established algae growth and biofilm; sensitive to ammonia.
โ Full Otocinclus care guide
Pygmy Corydoras โ 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. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-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 20 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?
72โ79ยฐF โ inside Otocinclus's 72โ82ยฐF and Pygmy Corydoras's 72โ79ยฐF.
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.
Related Compatibility Guides
Tank Size for Otocinclus and Pygmy Corydoras
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 20 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |