Pygmy Cory

Overview

The Pygmy Cory (Corydoras pygmaeus) is a tiny social catfish that uniquely swims in mid-water as well as along the substrate. One of the smallest Corydoras species, ideal for nano planted tanks.

Water Parameters

• Temperature: 22–27°C (72–81°F)
• pH: 6.0–7.5
• Hardness: 4–12 dGH

Tank Setup

• Minimum tank size: 55 litres for 8+
• Substrate: Fine sand essential
• Decor: Dense planting with floating cover; they swim at all levels

Diet

• Base: Micro sinking pellets, crushed flake
• Treats: Micro worms, daphnia, frozen brine shrimp
• Note: Very small mouth — food must be appropriately sized

Temperament & Tank Mates

• Temperament: Peaceful, social schooling fish
• Best companions: Other nano fish (Ember Tetras, endlers, rasboras), dwarf shrimp, snails
• Avoid: Any fish large enough to eat them
• Schooling: Minimum 8; they school in mid-water — unique behaviour

Breeding

• Difficulty: Easy; scatter spawner
• Process: Fine-leaved plants; fry are very tiny — require micro foods

Common Issues

• Very small — easily outcompeted for food
• May rest on plant leaves and even on each other — normal behaviour
• Lifespan: 3–5 years