Can kribensis live with serpae tetras?

Verdict
Yes

Yes. Kribensis and serpae tetras make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

KribensisKribensis75–80°F · pH 6–7.5 Serpae tetraSerpae tetra72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Kribensis 75–80°Serpae tetra 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Kribensis 6–7.5Serpae tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Kribensis · 4 inSerpae tetra · 1.75 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

KribensisSerpae tetra
Temperature75–80 °F72–79 °F
pH6–7.56–7.5
Adult size4.0 in1.75 in
Minimum tank30 gal20 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for kribensis

All kribensis tank mates

Better tank mates for serpae tetras

All serpae tetra tank mates

Questions

Can kribensis live with serpae tetras?

Yes. Kribensis and serpae tetras make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both kribensis and serpae tetras?

75–79 °F. Kribensis need 75–80 °F, serpae tetras need 72–79 °F.

What size tank do kribensis and serpae tetras need together?

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