Can nerite snails live with upside down catfish?

Verdict
Yes

Yes, nerite snails and upside down catfish can live together. Both are fine at 72–78°F. Plan on at least 30 gal.

Nerite snailNerite snail72–78°F · pH 7–8.5 Upside down catfishUpside down catfish72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–78°Nerite snail 72–78°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 7–7.5Nerite snail 7–8.5Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Nerite snail · 1 inUpside down catfish · 4 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

Nerite snailUpside down catfish
Temperature72–78 °F72–79 °F
pH7–8.56–7.5
Adult size1.0 in4.0 in
Minimum tank5 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupAlone or in pairsGroups of 3+
DietHerbivoreOmnivore

Better tank mates for nerite snails

All nerite snail tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can nerite snails live with upside down catfish?

Yes, nerite snails and upside down catfish can live together. Both are fine at 72–78°F. Plan on at least 30 gal.

What temperature suits both nerite snails and upside down catfish?

72–78 °F. Nerite snails need 72–78 °F, upside down catfish need 72–79 °F.

What size tank do nerite snails and upside down catfish need together?

At least 30 gal, set by the upside down catfish. Add space for each extra fish.