Can otocinclus live with glowlight tetras?

Verdict
Yes

Yes. Otocinclus and glowlight tetras make a good pair. Both are fine at 74–79°F. Plan on at least 20 gal.

OtocinclusOtocinclus72–79°F · pH 6–7.5 Glowlight tetraGlowlight tetra74–80°F · pH 6–7.5

Why it works

Water side by side

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

Size to scale

Otocinclus · 2 inGlowlight tetra · 1.5 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

OtocinclusGlowlight tetra
Temperature72–79 °F74–80 °F
pH6–7.56–7.5
Adult size2.0 in1.5 in
Minimum tank20 gal10 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietHerbivoreOmnivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can otocinclus live with glowlight tetras?

Yes. Otocinclus and glowlight tetras make a good pair. Both are fine at 74–79°F. Plan on at least 20 gal.

What temperature suits both otocinclus and glowlight tetras?

74–79 °F. Otocinclus need 72–79 °F, glowlight tetras need 74–80 °F.

What size tank do otocinclus and glowlight tetras need together?

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