Can bettas live with zebra loaches?

Verdict
Yes

Yes. Bettas and zebra loaches get along in the same tank. Both are fine at 76–79°F. Plan on at least 30 gal.

BettaBetta76–82°F · pH 6.5–7.5 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: 76–79°Betta 76–82°Zebra loach 73–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Betta 6.5–7.5Zebra loach 6–7.5
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 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

BettaZebra loach
Temperature76–82 °F73–79 °F
pH6.5–7.56–7.5
Adult size2.5 in3.5 in
Minimum tank5 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atTopBottom
GroupOne per tankGroups of 5+
DietCarnivoreOmnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for zebra loaches

All zebra loach tank mates

Questions

Can bettas live with zebra loaches?

Yes. Bettas and zebra loaches get along in the same tank. Both are fine at 76–79°F. Plan on at least 30 gal.

What temperature suits both bettas and zebra loaches?

76–79 °F. Bettas need 76–82 °F, zebra loaches need 73–79 °F.

What size tank do bettas and zebra loaches need together?

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