Can otocinclus live with odessa barbs?

Verdict
Yes

Yes, otocinclus and odessa barbs can live together. Both are fine at 72–79°F. Plan on at least 30 gal.

OtocinclusOtocinclus72–79°F · pH 6–7.5 Odessa barbOdessa barb70–79°F · pH 6–7.5

Why it works

Water side by side

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

Size to scale

Otocinclus · 2 inOdessa barb · 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

OtocinclusOdessa barb
Temperature72–79 °F70–79 °F
pH6–7.56–7.5
Adult size2.0 in3.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietHerbivoreOmnivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for odessa barbs

All odessa barb tank mates

Questions

Can otocinclus live with odessa barbs?

Yes, otocinclus and odessa barbs can live together. Both are fine at 72–79°F. Plan on at least 30 gal.

What temperature suits both otocinclus and odessa barbs?

72–79 °F. Otocinclus need 72–79 °F, odessa barbs need 70–79 °F.

What size tank do otocinclus and odessa barbs need together?

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