Can rainbow sharks live with dwarf neon rainbowfish?

Verdict
Yes

Yes, rainbow sharks and dwarf neon rainbowfish can live together. Both are fine at 75–80°F. Plan on at least 55 gal.

Rainbow sharkRainbow shark72–80°F · pH 6.5–7.5 Dwarf neon rainbowfishDwarf neon rainbowfish75–82°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Rainbow shark 72–80°Dwarf neon rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Rainbow shark 6.5–7.5Dwarf neon rainbowfish 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Rainbow shark · 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

Rainbow sharkDwarf neon rainbowfish
Temperature72–80 °F75–82 °F
pH6.5–7.56.5–7.5
Adult size6.0 in2.5 in
Minimum tank55 gal20 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupOne per tankGroups of 6+
DietOmnivoreOmnivore

Better tank mates for rainbow sharks

All rainbow shark tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can rainbow sharks live with dwarf neon rainbowfish?

Yes, rainbow sharks and dwarf neon rainbowfish can live together. Both are fine at 75–80°F. Plan on at least 55 gal.

What temperature suits both rainbow sharks and dwarf neon rainbowfish?

75–80 °F. Rainbow sharks need 72–80 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do rainbow sharks and dwarf neon rainbowfish need together?

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