Can bettas live with discus?

Verdict
Yes, with care

Yes, with care. Bettas and discus can share a tank, but watch one thing. They only share 82°F. Keep the heater set there and steady.

BettaBetta76–82°F · pH 6.5–7.5 DiscusDiscus82–88°F · pH 5.5–7

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 82°Betta 76–82°Discus 82–88°
The green band is the temperature range both can live in.
456789Both: 6.5–7Betta 6.5–7.5Discus 5.5–7
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 inDiscus · 6 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

BettaDiscus
Temperature76–82 °F82–88 °F
pH6.5–7.55.5–7
Adult size2.5 in6.0 in
Minimum tank5 gal55 gal
TemperamentSemi-aggressivePeaceful
Swims atTopMiddle
GroupOne per tankGroups of 5+
DietCarnivoreCarnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for discus

All discus tank mates

Questions

Can bettas live with discus?

Yes, with care. Bettas and discus can share a tank, but watch one thing. They only share 82°F. Keep the heater set there and steady.

What temperature suits both bettas and discus?

82–82 °F. Bettas need 76–82 °F, discus need 82–88 °F.

What size tank do bettas and discus need together?

At least 55 gal, set by the discus. Add space for each extra fish.