Can ember tetras live with upside down catfish?

Verdict
Yes

Yes. Ember tetras and upside down catfish get along in the same tank. Both are fine at 73–79°F. Plan on at least 30 gal.

Ember tetraEmber tetra73–84°F · pH 5.5–7 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: 73–79°Ember tetra 73–84°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7Ember tetra 5.5–7Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Ember tetra · 0.8 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

Ember tetraUpside down catfish
Temperature73–84 °F72–79 °F
pH5.5–76–7.5
Adult size0.8 in4.0 in
Minimum tank5 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for ember tetras

All ember tetra tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can ember tetras live with upside down catfish?

Yes. Ember tetras and upside down catfish get along in the same tank. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both ember tetras and upside down catfish?

73–79 °F. Ember tetras need 73–84 °F, upside down catfish need 72–79 °F.

What size tank do ember tetras and upside down catfish need together?

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