Can yoyo loaches live with upside down catfish?

Verdict
Yes

Yes, yoyo loaches and upside down catfish can live together. Both are fine at 75–79°F. Plan on at least 40 gal.

Yoyo loachYoyo loach75–86°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: 75–79°Yoyo loach 75–86°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Yoyo loach 6–7.5Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Yoyo loach · 5 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

Yoyo loachUpside down catfish
Temperature75–86 °F72–79 °F
pH6–7.56–7.5
Adult size5.0 in4.0 in
Minimum tank40 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomBottom
GroupGroups of 5+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for yoyo loaches

All yoyo loach tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can yoyo loaches live with upside down catfish?

Yes, yoyo loaches and upside down catfish can live together. Both are fine at 75–79°F. Plan on at least 40 gal.

What temperature suits both yoyo loaches and upside down catfish?

75–79 °F. Yoyo loaches need 75–86 °F, upside down catfish need 72–79 °F.

What size tank do yoyo loaches and upside down catfish need together?

At least 40 gal, set by the yoyo loach. Add space for each extra fish.