Red discus vs Cockatoo cichlid: can they live together?

Verdict: With caution

The Cockatoo cichlid is best kept in a species tank.
The Red discus grows about twice as long as the Cockatoo cichlid; watch for bullying or predation.
Their temperature ranges only just meet, at 27°C (81°F).
A pH of 5.0–6.5 suits both.
Minimum tank for the pair: 210 L (55 US gal)

Side by side

	Red discus	Cockatoo cichlid
Adult size	18 cm (7.1 in)	7.5 cm (3 in)
Minimum tank	210 L (55 US gal)	75 L (20 US gal)
Temperature	27–33°C (81–91°F)	24–27°C (75–81°F)
pH	4.2–6.5	5.0–7.0
Hardness	–	5–16 dGH (89–286 ppm)
Temperament	Peaceful	Peaceful
Community tank	–	Not suitable
Care level	Moderate	Moderate
Diet	Carnivore	Carnivore