Can Common Goldfish and Discus live together?

Common Goldfish and Discus are not compatible. The comparison on this page runs the same compatibility engine as the tank builder, checking temperature and pH overlap, predation by size, temperament, and known hard-pair conflicts.

Species Comparison

Common Goldfish vs Discus

Common Goldfish

Carassius auratus

Discus

Symphysodon aequifasciatus

Verdict:Not compatible

Side-by-side specs

Goldfish

Family

Cichlids

14″

Adult size

6″

75gal

Min tank

75gal

60–72°F

Temperature

82–88°F

6.5–8

5.5–7

peaceful

Temperament

peaceful

Solitary

Schooling

All

Water level

mid

Compatibility notes

criticalCommon Goldfish (60–72°F) and Discus (82–88°F) need different temperatures.
criticalCommon Goldfish produces heavy waste and needs cool water — Discus won't tolerate sharing a tank.

Try both in the builder →Compare different species