Can discus live with dwarf neon rainbowfish?

Verdict
Yes, with care

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

DiscusDiscus82–88°F · pH 5.5–7 Dwarf neon rainbowfishDwarf neon rainbowfish75–82°F · pH 6.5–7.5

What to watch

What works

Water side by side

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

Size to scale

Discus · 6 inDwarf neon rainbowfish · 2.5 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

DiscusDwarf neon rainbowfish
Temperature82–88 °F75–82 °F
pH5.5–76.5–7.5
Adult size6.0 in2.5 in
Minimum tank55 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can discus live with dwarf neon rainbowfish?

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

What temperature suits both discus and dwarf neon rainbowfish?

82–82 °F. Discus need 82–88 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do discus and dwarf neon rainbowfish need together?

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