Pygmy Corydoras and Rainbow Shark Compatibility Overview
Pygmy Corydoras and Rainbow Shark can potentially coexist, but the combination requires careful attention. Pygmy Corydoras is peaceful and Rainbow Shark is semi, so give them room and cover rather than assuming they will ignore each other. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
| Factor | Pygmy Corydoras | Rainbow Shark | Verdict |
|---|---|---|---|
| Temperature | 72โ79ยฐF | 72โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ7.5 | 6.5โ7.5 | โ 6.5โ7.5 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1 in | 6 in | โ 6ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
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.
โ Full Pygmy Corydoras care guide
Rainbow Shark โ Epalzeorhynchos frenatum
Active bottom dweller that becomes territorial at maturity. One per tank; avoid other shark-like or bottom-dwelling species.
Frequently Asked Questions
Can Pygmy Corydoras live with Rainbow Shark?
With significant caution and a larger tank. Pygmy Corydoras and Rainbow Shark can potentially coexist, but the combination requires careful attention. Pygmy Corydoras is peaceful and Rainbow Shark is semi, so give them room and cover rather than assuming they will ignore each other. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Pygmy Corydoras and Rainbow Shark together?
A minimum of 75 gallons is recommended for keeping Pygmy Corydoras and Rainbow Shark together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Pygmy Corydoras and Rainbow Shark?
72โ79ยฐF โ inside Pygmy Corydoras's 72โ79ยฐF and Rainbow Shark's 72โ79ยฐF.
Is a Pygmy Corydoras aggressive toward a Rainbow Shark?
Pygmy Corydoras is peaceful and Rainbow Shark is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Pygmy Corydoras and Rainbow Shark
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |