Can honey gouramis live with upside down catfish?

Verdict
Yes

Yes, honey gouramis and upside down catfish can live together. Both are fine at 72–79°F. Plan on at least 30 gal.

Honey gouramiHoney gourami72–82°F · pH 6–7.5 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: 72–79°Honey gourami 72–82°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Honey gourami 6–7.5Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Honey gourami · 2 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

Honey gouramiUpside down catfish
Temperature72–82 °F72–79 °F
pH6–7.56–7.5
Adult size2.0 in4.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupAlone or in pairsGroups of 3+
DietOmnivoreOmnivore

Better tank mates for honey gouramis

All honey gourami tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can honey gouramis live with upside down catfish?

Yes, honey gouramis and upside down catfish can live together. Both are fine at 72–79°F. Plan on at least 30 gal.

What temperature suits both honey gouramis and upside down catfish?

72–79 °F. Honey gouramis need 72–82 °F, upside down catfish need 72–79 °F.

What size tank do honey gouramis and upside down catfish need together?

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