Blue discus

Symphysodon aequifasciatus

Family : Cichlidae

FishFreshwatercichlids

The blue discus is a South American cichlid renowned for its round shape and bright colors. It is considered the king of the freshwater aquarium.

Blue discus — photo 1 sur 4
Jonas Engler · Wikimedia Commons · CC BY-SA 3.01 / 4
Popularity
Biotope specialist
requires biotope recreation
Availability
Specialty only
Shop availability
IUCN Status
LC
Least Concern
Biotope
Amazon+1
Bassin amazonien : eaux douces chaudes, acides, noires ou claires.

Description

The blue discus has a disc-shaped, laterally compressed body with long dorsal and anal fins. Its base coloration is electric blue with darker vertical stripes. Many selected varieties exist. It is a schooling fish that lives in groups. It is sensitive to stress and requires impeccable water quality. Adults reach up to 15 cm in diameter.

Habitat

Region :

The blue discus lives in calm, acidic waters of Amazonian rivers and lakes, often near wooded banks. It prefers shaded areas with submerged roots and dense vegetation. The water is very soft and rich in tannins.

Distribution :

Recommended parameters

Temperature2830 °C
pH5.56.5
GH14 °dGH
KH13 °dKH
NO₃
≤ 5 mg/L
PO₄
≤ 0.1 mg/L

Care

Difficulty
4/5
Diet
Carnivore
Min. tank
300 L
Min. group
5
Adult size
15 cm
Lifespan
10 years
Temperament
Peaceful
Propagation
Pondent sur des surfaces verticales. Les parents produisent un mucus cutané dont se nourrissent les alevins. Reproduction délicate nécessitant une eau très douce et acide.

Care notes

Keep discus in groups of at least 5 in a minimum 300 L aquarium. Water must be very acidic (pH 5.5-6.5) and very soft (GH 1-4). Ideal temperature is 28-30°C. Weekly 30% water changes are essential. The setup should include roots, robust plants, and a dark substrate. They are carnivorous: feed quality frozen foods (artemia, bloodworms) and specific pellets. Avoid aggressive fish; tetras and corydoras are good tankmates.

Similar species

Espèces proches, même habitat ou même maintenance

References