Compatibility Overview
Guppy 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 40-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Guppy | Pygmy Corydoras | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 72–79°F | ✅ 72–79°F |
| pH Range | 6.8–8.5 | 6.0–7.5 | ⚠️ 6.8–7.5 (narrow) |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 2.5 in | 1 in | ⚠️ 2.5× difference |
| Min. Group | 3+ | 6+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Guppy — Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
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 Guppy live with Pygmy Corydoras?
Yes, in a well-planned setup. Guppy 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 40-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Guppy and Pygmy Corydoras together?
A minimum of 40 gallons is recommended for keeping Guppy and Pygmy Corydoras together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Guppy and Pygmy Corydoras?
72–79°F
Is a Guppy aggressive toward a Pygmy Corydoras?
Guppy is peaceful and Pygmy Corydoras is peaceful. Limited pH overlap (6.8–7.5) — maintain pH carefully within this narrow window.