Can Bronze corydoras live with Guppy?

Temperature. Bronze corydoras does best at 21–25 °C (70–77 °F) and Guppy at 18–28 °C (64–82 °F). They share 21–25 °C.

Water. Their pH ranges overlap at 7–7.

Temperament and size. Bronze corydoras is peaceful and grows to 7.5 cm; Guppy is peaceful and grows to 6 cm. Bronze corydoras swims at the bottom and Guppy at the top, which spreads them out.

Tank size and groups. Plan on at least 20 US gallons, the larger of the two cautious minimums. Keep Bronze corydoras in a group of 6+. Keep Guppy in a group of 3+. A starter mix of 6 Bronze corydoras and 3 Guppy in 20 gallons uses about 105% of the tank’s bioload capacity under our rules and grades A.

Keeping them together

• Feeding: Bronze corydoras feeds on the bottom. Add sinking pellets or wafers after lights-out so faster mid-water fish don’t take it all.
• Aquascape: both are calmer with cover. Plants and floating cover make shy fish come out more, not less.
• Group size: a full group is not optional. A schooling fish kept in too small a group is stressed and more likely to nip or hide.
• Shrimp and snails: neither is a known invertebrate eater, but baby shrimp can still be eaten. Dense moss helps.
• Adding them: add the calmer species first and let it settle for a week or two before adding the other, and only once your tank has cycled.

Open this pair in the checker Add your other fish to grade the whole tank.

Quick facts

Data from the Species Ledger, checked November 9, 2026, with at least two sources per species. Cautious community guidelines, not guarantees: individual fish vary. Not veterinary advice. Disagree? Tell us.