Can platies live with upside down catfish?

Verdict
Yes

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

PlatyPlaty70–80°F · pH 7–8.2 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°Platy 70–80°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 7–7.5Platy 7–8.2Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 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

PlatyUpside down catfish
Temperature70–80 °F72–79 °F
pH7–8.26–7.5
Adult size2.5 in4.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 3+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for platies

All platy tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can platies live with upside down catfish?

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

What temperature suits both platies and upside down catfish?

72–79 °F. Platies need 70–80 °F, upside down catfish need 72–79 °F.

What size tank do platies and upside down catfish need together?

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