Can ember tetras live with siamese algae eaters?

Verdict
Yes

Yes. Ember tetras and siamese algae eaters make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

Ember tetraEmber tetra73–84°F · pH 5.5–7 Siamese algae eaterSiamese algae eater75–79°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Ember tetra 73–84°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7Ember tetra 5.5–7Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Ember tetra · 0.8 inSiamese algae eater · 6 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

Ember tetraSiamese algae eater
Temperature73–84 °F75–79 °F
pH5.5–76.5–7.5
Adult size0.8 in6.0 in
Minimum tank5 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreHerbivore

Better tank mates for ember tetras

All ember tetra tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can ember tetras live with siamese algae eaters?

Yes. Ember tetras and siamese algae eaters make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both ember tetras and siamese algae eaters?

75–79 °F. Ember tetras need 73–84 °F, siamese algae eaters need 75–79 °F.

What size tank do ember tetras and siamese algae eaters need together?

At least 30 gal, set by the siamese algae eater. Add space for each extra fish.