Can platies live with glowlight tetras?

Verdict
Yes

Yes. Platies and glowlight tetras make a good pair. Both are fine at 74–80°F. Plan on at least 10 gal.

PlatyPlaty70–80°F · pH 7–8.2 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: 74–80°Platy 70–80°Glowlight tetra 74–80°
The green band is the temperature range both can live in.
456789Both: 7–7.5Platy 7–8.2Glowlight tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 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

PlatyGlowlight tetra
Temperature70–80 °F74–80 °F
pH7–8.26–7.5
Adult size2.5 in1.5 in
Minimum tank10 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for platies

All platy tank mates

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can platies live with glowlight tetras?

Yes. Platies and glowlight tetras make a good pair. Both are fine at 74–80°F. Plan on at least 10 gal.

What temperature suits both platies and glowlight tetras?

74–80 °F. Platies need 70–80 °F, glowlight tetras need 74–80 °F.

What size tank do platies and glowlight tetras need together?

At least 10 gal, set by the platy. Add space for each extra fish.