Can pictus catfish live with boesemani rainbowfish?

Verdict
Yes

Yes. Pictus catfish and boesemani rainbowfish make a good pair. Both are fine at 75–79°F. Plan on at least 55 gal.

Pictus catfishPictus catfish72–79°F · pH 6–7.5 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Pictus catfish 72–79°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Pictus catfish 6–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Pictus catfish · 5 inBoesemani rainbowfish · 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

Pictus catfishBoesemani rainbowfish
Temperature72–79 °F75–82 °F
pH6–7.57–8
Adult size5.0 in4.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupGroups of 3+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for pictus catfish

All pictus catfish tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can pictus catfish live with boesemani rainbowfish?

Yes. Pictus catfish and boesemani rainbowfish make a good pair. Both are fine at 75–79°F. Plan on at least 55 gal.

What temperature suits both pictus catfish and boesemani rainbowfish?

75–79 °F. Pictus catfish need 72–79 °F, boesemani rainbowfish need 75–82 °F.

What size tank do pictus catfish and boesemani rainbowfish need together?

At least 55 gal, set by the pictus catfish. Add space for each extra fish.