Bronze Corydoras

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingRoutine tank care

  Weekly partial water changes keep them in top shape.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment5–10 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Parasites

The Bronze Corydoras (Corydoras aeneus) is the most widely kept corydoras in the world, found across a huge range in South America and reaching about 6 to 7 cm. It is sold in the wild bronze form and as albino and green line-bred variants. Like all corydoras it can breathe atmospheric air through its intestine, which is why healthy fish make regular quick trips to the surface. That is normal behaviour; constant surfacing combined with laboured breathing is not. Keep a group of six or more, and preferably more, in 80 litres or more at 22-26C, pH 6.0 to 7.5, over soft sand. Substrate matters more than anything else here: sharp gravel wears down the barbels they use to find food, and eroded barbels are one of the most common avoidable problems in the hobby. Feed sinking wafers, frozen bloodworm and daphnia, making sure food actually reaches the bottom rather than being taken mid-water. They are entirely peaceful, safe with anything that will not eat them, and spawn readily after a cool water change, laying eggs on the glass and plants.

• How active is a Bronze Corydoras?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Bronze Corydoras need?

  Routine tank care. Weekly partial water changes keep them in top shape.

• What tank size does a Bronze Corydoras need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Bronze Corydoras a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Bronze Corydoras live?

  5–10 years. Plan for a long, loving relationship.

• What health issues affect the Bronze Corydoras?

  Keep an eye out for Ich (white spot), Fin rot, Parasites. These are worth raising with your vet, along with any screening they recommend.

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