Can otocinclus live with chinese algae eaters?

Verdict
Yes

Yes. Otocinclus and chinese algae eaters make a good pair. Both are fine at 74–79°F. Plan on at least 75 gal.

OtocinclusOtocinclus72–79°F · pH 6–7.5 Chinese algae eaterChinese algae eater74–80°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–79°Otocinclus 72–79°Chinese algae eater 74–80°
The green band is the temperature range both can live in.
456789Both: 6–7.5Otocinclus 6–7.5Chinese algae eater 6–8
The green band is the pH both tolerate.

Size to scale

Otocinclus · 2 inChinese algae eater · 10 in0"2"4"6"8"10"
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

OtocinclusChinese algae eater
Temperature72–79 °F74–80 °F
pH6–7.56–8
Adult size2.0 in10.0 in
Minimum tank20 gal75 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomBottom
GroupGroups of 6+Alone or in pairs
DietHerbivoreHerbivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for chinese algae eaters

All chinese algae eater tank mates

Questions

Can otocinclus live with chinese algae eaters?

Yes. Otocinclus and chinese algae eaters make a good pair. Both are fine at 74–79°F. Plan on at least 75 gal.

What temperature suits both otocinclus and chinese algae eaters?

74–79 °F. Otocinclus need 72–79 °F, chinese algae eaters need 74–80 °F.

What size tank do otocinclus and chinese algae eaters need together?

At least 75 gal, set by the chinese algae eater. Add space for each extra fish.