Otocinclus and Pea Puffer Compatibility Overview
Otocinclus and Pea Puffer can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Otocinclus is peaceful and Pea Puffer is semi, so give them room and cover rather than assuming they will ignore each other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Otocinclus | Pea Puffer | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 74โ82ยฐF | โ 74โ82ยฐF |
| pH Range | 6.0โ7.5 | 7.0โ8.0 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.5 in | 1 in | โ Similar |
| Min. Group | 4+ | 1+ | 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
Pea Puffer โ Carinotetraodon travancoricus
World's smallest pufferfish โ intensely territorial and nippy despite tiny size. Will attack fins and eat shrimp and snails.
Frequently Asked Questions
Can Otocinclus live with Pea Puffer?
Yes, in a well-planned setup. Otocinclus and Pea Puffer can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Otocinclus is peaceful and Pea Puffer is semi, so give them room and cover rather than assuming they will ignore each 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 Pea Puffer together?
A minimum of 20 gallons is recommended for keeping Otocinclus and Pea Puffer together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Otocinclus and Pea Puffer?
74โ82ยฐF โ inside Otocinclus's 72โ82ยฐF and Pea Puffer's 74โ82ยฐF.
Is a Otocinclus aggressive toward a Pea Puffer?
Otocinclus is peaceful and Pea Puffer is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Otocinclus and Pea Puffer
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 | 40 gal | Best when keeping larger schools or reducing territorial pressure. |