Can congo tetras live with zebra loaches?

Verdict
Yes

Yes. Congo tetras and zebra loaches make a good pair. Both are fine at 73–79°F. Plan on at least 30 gal.

Congo tetraCongo tetra73–82°F · pH 6–7.5 Zebra loachZebra loach73–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Congo tetra 73–82°Zebra loach 73–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Congo tetra 6–7.5Zebra loach 6–7.5
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 inZebra loach · 3.5 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 tetraZebra loach
Temperature73–82 °F73–79 °F
pH6–7.56–7.5
Adult size3.0 in3.5 in
Minimum tank30 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 5+
DietOmnivoreOmnivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for zebra loaches

All zebra loach tank mates

Questions

Can congo tetras live with zebra loaches?

Yes. Congo tetras and zebra loaches make a good pair. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both congo tetras and zebra loaches?

73–79 °F. Congo tetras need 73–82 °F, zebra loaches need 73–79 °F.

What size tank do congo tetras and zebra loaches need together?

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