Can Discus and Ranchu Goldfish live together?

Discus and Ranchu Goldfish 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

Discus vs Ranchu Goldfish

Discus

Symphysodon aequifasciatus

Ranchu Goldfish

Carassius auratus var. ranchu

Verdict:Not compatible

Side-by-side specs

Cichlids

Family

Goldfish

6″

Adult size

7″

75gal

Min tank

30gal

82–88°F

Temperature

65–75°F

5.5–7

6.5–8

peaceful

Temperament

peaceful

Schooling

Solitary

mid

Water level

mid

Compatibility notes

criticalDiscus (82–88°F) and Ranchu Goldfish (65–75°F) need different temperatures.
criticalRanchu Goldfish produces heavy waste and needs cool water — Discus won't tolerate sharing a tank.

Try both in the builder →Compare different species