Can congo tetras live with apistogramma?

Verdict
Yes

Yes. Congo tetras and apistogramma get along in the same tank. Both are fine at 75–82°F. Plan on at least 30 gal.

Congo tetraCongo tetra73–82°F · pH 6–7.5 ApistogrammaApistogramma75–84°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Congo tetra 73–82°Apistogramma 75–84°
The green band is the temperature range both can live in.
456789Both: 6–7Congo tetra 6–7.5Apistogramma 5–7
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 inApistogramma · 3 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

Congo tetraApistogramma
Temperature73–82 °F75–84 °F
pH6–7.55–7
Adult size3.0 in3.0 in
Minimum tank30 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreCarnivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for apistogramma

All apistogramma tank mates

Questions

Can congo tetras live with apistogramma?

Yes. Congo tetras and apistogramma get along in the same tank. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both congo tetras and apistogramma?

75–82 °F. Congo tetras need 73–82 °F, apistogramma need 75–84 °F.

What size tank do congo tetras and apistogramma need together?

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