Quick Stats
| Adult Size | 2.5 cm |
| Minimum Tank | 10 gal |
| Temperature | 22–26°C |
| pH Range | 6.0–7.5 |
| Hardness (GH) | 2–15 dGH |
| Difficulty | Easy |
| Temperament | Peaceful |
| Diet | Omnivore — sinking pellets, frozen bloodworm, algae wafers |
| Schooling | 6+ required |
Tank Setup
The Pygmy Corydoras (Corydoras pygmaeus) requires a minimum tank size of 10 gal. For a species this size, a larger tank is always better — more water volume means more stable parameters and a healthier environment.
Water parameters should be maintained within the following ranges: temperature 22–26°C, pH 6.0–7.5, and hardness 2–15 dGH. These are relatively tolerant fish that adapt to a range of conditions.
Provide appropriate hiding places, a suitable substrate, and open swimming space to match the natural behaviour of this species.
Tank Mates
Pygmy Corydoras are peaceful fish. They work well in community tanks with similarly-sized peaceful species.
Compatible tank mates include: Neon Tetra, Ember Tetra, Cherry Shrimp, Betta Fish, Harlequin Rasbora. Avoid housing with aggressive or much larger fish.
Schooling requirements: 6+ required. Keeping them in adequate numbers is essential for their wellbeing.
Diet & Feeding
Pygmy Corydoras are Omnivore. Feed a varied diet to ensure optimal health and colouration.
Omnivore — sinking pellets, frozen bloodworm, algae wafers
Feed small amounts 1–2 times daily. Only provide what the fish can consume within 2–3 minutes to prevent overfeeding and water quality issues. Supplement with live or frozen foods for optimal health and colour.
Common Health Issues
Like all aquarium fish, Pygmy Corydoras can be susceptible to common diseases including ich (white spot disease), fin rot, and bacterial infections. This species is generally hardy and disease-resistant when kept in good conditions.
Prevention is always better than treatment. Maintain stable water parameters, avoid overfeeding, quarantine new fish before adding them to the main tank, and perform regular water changes. A regular maintenance routine will prevent most health issues.
If disease does occur, isolate affected fish in a quarantine tank and treat appropriately. Always research medication compatibility before use — some treatments are toxic to invertebrates and scaleless fish.
Breeding
Breeding Pygmy Corydoras is possible in the home aquarium.
Provide appropriate breeding conditions — caves or hiding places for egg-laying species. Condition breeding pairs with high-quality foods before attempting to spawn them.
Many Pygmy Corydoras will breed readily without intervention. Be prepared to remove eggs or fry if you want to raise them — adult fish may eat their own young.
Frequently Asked Questions
What size tank does a Pygmy Corydoras need?
A Pygmy Corydoras needs a minimum tank size of 10 gal. However, larger is always better — more water volume means more stable water parameters and healthier fish.
Are Pygmy Corydoras easy to keep?
Pygmy Corydoras are rated as Easy difficulty. Beginners can keep them successfully with proper research and a cycled tank.
What do Pygmy Corydoras eat?
Pygmy Corydoras are Omnivore. Feed a varied diet including sinking pellets, frozen bloodworm, algae wafers.
Can Pygmy Corydoras live with other fish?
Pygmy Corydoras are peaceful. Compatible tankmates include: Neon Tetra, Ember Tetra, Cherry Shrimp, Betta Fish, Harlequin Rasbora. They work well in community tanks with similarly-sized peaceful fish.