Can congo tetras live with siamese algae eaters?

Verdict
Yes

Yes. Congo tetras and siamese algae eaters get along in the same tank. Both are fine at 75–79°F. Plan on at least 30 gal.

Congo tetraCongo tetra73–82°F · pH 6–7.5 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°Congo tetra 73–82°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Congo tetra 6–7.5Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 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

Congo tetraSiamese algae eater
Temperature73–82 °F75–79 °F
pH6–7.56.5–7.5
Adult size3.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreHerbivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can congo tetras live with siamese algae eaters?

Yes. Congo tetras and siamese algae eaters get along in the same tank. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both congo tetras and siamese algae eaters?

75–79 °F. Congo tetras need 73–82 °F, siamese algae eaters need 75–79 °F.

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

At least 30 gal, set by the congo tetra. Add space for each extra fish.