Can apistogramma live with serpae tetras?

Verdict
Yes

Yes. Apistogramma and serpae tetras make a good pair. Both are fine at 75–79°F. Plan on at least 20 gal.

ApistogrammaApistogramma75–84°F · pH 5–7 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°Apistogramma 75–84°Serpae tetra 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7Apistogramma 5–7Serpae tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Apistogramma · 3 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

ApistogrammaSerpae tetra
Temperature75–84 °F72–79 °F
pH5–76–7.5
Adult size3.0 in1.75 in
Minimum tank20 gal20 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietCarnivoreOmnivore

Better tank mates for apistogramma

All apistogramma tank mates

Better tank mates for serpae tetras

All serpae tetra tank mates

Questions

Can apistogramma live with serpae tetras?

Yes. Apistogramma and serpae tetras make a good pair. Both are fine at 75–79°F. Plan on at least 20 gal.

What temperature suits both apistogramma and serpae tetras?

75–79 °F. Apistogramma need 75–84 °F, serpae tetras need 72–79 °F.

What size tank do apistogramma and serpae tetras need together?

At least 20 gal, set by the apistogramma. Add space for each extra fish.