The goldfish (Carassius auratus) is one of the most popular cold-water fish species. Easy to keep and very sociable, it is perfectly suited to family aquariums or small outdoor ponds.

Behaviour and care

It is a peaceful, schooling and curious fish. It enjoys living in a group (at least 2 to 3 individuals) in a spacious aquarium of at least 60 L per fish. Avoid tanks that are too small or fish bowls, which are detrimental to its well-being.

For more information on care, see our guide: Goldfish care guide.

Diet

The goldfish is omnivorous: it enjoys flakes, pellets and fresh foods. We recommend varying its diet to maintain vivid colours and good digestive health.
Discover our selection of foods for goldfish.

Water quality

• Ideal temperature: 18 – 24 °C
• pH: 6.8 – 7.5
• GH: 6 – 12 °dGH
• KH: 4 – 8 °KH
• Conductivity: 300 – 600 µS

Before introducing the fish, treat the water with a suitable water conditioner to remove chlorine and heavy metals.

Décor and environment

This fish likes to dig in the substrate: choose fine sand and hardy aquatic plants such as Anubias or Elodea.
Avoid very delicate plants that it could uproot.

Care sheet

AquaBota tip

A weekly 20% water change and a properly sized filter ensure clear and healthy water.
Discover our range of aquarium filters suitable for goldfish.