Can otocinclus live with apistogramma?

Verdict
Yes

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

OtocinclusOtocinclus72–79°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: 75–79°Otocinclus 72–79°Apistogramma 75–84°
The green band is the temperature range both can live in.
456789Both: 6–7Otocinclus 6–7.5Apistogramma 5–7
The green band is the pH both tolerate.

Size to scale

Otocinclus · 2 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

OtocinclusApistogramma
Temperature72–79 °F75–84 °F
pH6–7.55–7
Adult size2.0 in3.0 in
Minimum tank20 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomBottom
GroupGroups of 6+Alone or in pairs
DietHerbivoreCarnivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for apistogramma

All apistogramma tank mates

Questions

Can otocinclus live with apistogramma?

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

What temperature suits both otocinclus and apistogramma?

75–79 °F. Otocinclus need 72–79 °F, apistogramma need 75–84 °F.

What size tank do otocinclus and apistogramma need together?

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