Can rams live with dwarf neon rainbowfish?

Verdict
Yes

Yes, rams and dwarf neon rainbowfish can live together. Both are fine at 80–82°F. Plan on at least 20 gal.

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 80–82°German blue ram 80–86°Dwarf neon rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7German blue ram 5–7Dwarf neon rainbowfish 6.5–7.5
The green band is the pH both tolerate.

Size to scale

German blue ram · 2.5 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

German blue ramDwarf neon rainbowfish
Temperature80–86 °F75–82 °F
pH5–76.5–7.5
Adult size2.5 in2.5 in
Minimum tank20 gal20 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for rams

All german blue ram tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can rams live with dwarf neon rainbowfish?

Yes, rams and dwarf neon rainbowfish can live together. Both are fine at 80–82°F. Plan on at least 20 gal.

What temperature suits both rams and dwarf neon rainbowfish?

80–82 °F. Rams need 80–86 °F, dwarf neon rainbowfish need 75–82 °F.

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

At least 20 gal, set by the german blue ram. Add space for each extra fish.