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Fish

Rudd

Scardinius erythrophthalmus
French name : Rotengle

The rudd is a robust European cyprinid found in still and slow-flowing waters rich in vegetation, easily recognised by its golden-bronze flanks and bright red-orange fins. It is a coldwater, unheated-aquarium or pond species that tolerates a wide temperature swing, from near-freezing winters to warm summers, and prefers neutral to alkaline, moderately hard water. A gregarious shoaling fish, it should be kept in groups of six or more and does best in large tanks or garden ponds because adults reach around 40 cm. It is peaceful toward other coldwater species of similar size but will eat very small fish. An opportunistic omnivore, it grazes on soft plants, algae, insect larvae, small crustaceans and flake or pellet foods. Provide strong filtration, plenty of open swimming space and cool, well-oxygenated water.

Water
Freshwater
Origin
Lakes and slow rivers across Europe and western Asia
Adult size
40 cm
Diet
Omnivore
Temperament
Peaceful
Difficulty
Intermediate
Keep in group of
6+
Rudd (Scardinius erythrophthalmus)
Illustration

Water parameters

Temperature4 – 22 °C
pH7 – 8
Carbonate hardness (KH)8 – 18 °dKH
General hardness (GH)10 – 25 °dGH

Tank & stocking

Minimum tank volume450 L
Volume budget per individual 60 L — adds up with tank-mates
Minimum group size6 individuals (shoaling)

“Minimum tank volume” is a reasonable floor, not an absolute limit. The per-individual budget is used by the Aqua app to estimate how heavily a tank is stocked.

Frequently asked questions

What size aquarium does Rudd need?

Provide at least 450 litres for a small group to keep Rudd in good conditions.

What water parameters does Rudd need?

A temperature of 4–22 °C, pH 7–8.

Is Rudd peaceful or aggressive?

Its temperament is peaceful.

What does Rudd eat?

Its diet: omnivore.

How many Rudd should be kept together?

It is a social species: keep a group of at least 6.

How big does Rudd get?

Around 40 cm as an adult.

Is Rudd suitable for beginners?

Care level: intermediate.

Planning a tank with Rudd?

AquaTender turns these parameters into live advice: it checks whether your tank is big enough, how heavily it's stocked, and whether your fish are compatible — then tracks water tests, photos and maintenance for you.

➕ Add Rudd to my tank Discover AquaTender
« Add to my tank » opens AquaTender — sign in (free) and pick your aquarium.

Fish from the same biotope

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