Can blood parrots live with upside down catfish?

Verdict
Yes

Yes. Blood parrots and upside down catfish get along in the same tank. Both are fine at 76–79°F. Plan on at least 55 gal.

Blood parrotBlood parrot76–80°F · pH 6.5–7.5 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: 76–79°Blood parrot 76–80°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Blood parrot 6.5–7.5Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Blood parrot · 8 inUpside down catfish · 4 in0"1"2"3"4"5"6"7"8"
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

Blood parrotUpside down catfish
Temperature76–80 °F72–79 °F
pH6.5–7.56–7.5
Adult size8.0 in4.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleBottom
GroupAlone or in pairsGroups of 3+
DietOmnivoreOmnivore

Better tank mates for blood parrots

All blood parrot tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can blood parrots live with upside down catfish?

Yes. Blood parrots and upside down catfish get along in the same tank. Both are fine at 76–79°F. Plan on at least 55 gal.

What temperature suits both blood parrots and upside down catfish?

76–79 °F. Blood parrots need 76–80 °F, upside down catfish need 72–79 °F.

What size tank do blood parrots and upside down catfish need together?

At least 55 gal, set by the blood parrot. Add space for each extra fish.