Can cardinal tetras live with boesemani rainbowfish?

Verdict
Yes, with care

Yes, with care. Cardinal tetras and boesemani rainbowfish can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.

Cardinal tetraCardinal tetra76–84°F · pH 4.6–7 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–82°Cardinal tetra 76–84°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7Cardinal tetra 4.6–7Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Cardinal tetra · 2 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

Cardinal tetraBoesemani rainbowfish
Temperature76–84 °F75–82 °F
pH4.6–77–8
Adult size2.0 in4.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can cardinal tetras live with boesemani rainbowfish?

Yes, with care. Cardinal tetras and boesemani rainbowfish can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.

What temperature suits both cardinal tetras and boesemani rainbowfish?

76–82 °F. Cardinal tetras need 76–84 °F, boesemani rainbowfish need 75–82 °F.

What size tank do cardinal tetras and boesemani rainbowfish need together?

At least 30 gal, set by the boesemani rainbowfish. Add space for each extra fish.