Can otocinclus live with paradise fish?

Verdict
Yes

Yes, otocinclus and paradise fish can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

OtocinclusOtocinclus72–79°F · pH 6–7.5 Paradise fishParadise fish61–79°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Otocinclus 72–79°Paradise fish 61–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Otocinclus 6–7.5Paradise fish 6–8
The green band is the pH both tolerate.

Size to scale

Otocinclus · 2 inParadise fish · 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

OtocinclusParadise fish
Temperature72–79 °F61–79 °F
pH6–7.56–8
Adult size2.0 in3.5 in
Minimum tank20 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomTop
GroupGroups of 6+One per tank
DietHerbivoreOmnivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for paradise fish

All paradise fish tank mates

Questions

Can otocinclus live with paradise fish?

Yes, otocinclus and paradise fish can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both otocinclus and paradise fish?

72–79 °F. Otocinclus need 72–79 °F, paradise fish need 61–79 °F.

What size tank do otocinclus and paradise fish need together?

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