Can goldfish live with siamese algae eaters?

Verdict
No

No. Goldfish and siamese algae eaters should not share a tank. Goldfish are coldwater animals (60–74°F); siamese algae eaters need 75–79°F. No temperature suits both.

GoldfishGoldfish60–74°F · pH 7–8 Siamese algae eaterSiamese algae eater75–79°F · pH 6.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Goldfish 60–74°Siamese algae eater 75–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 7–7.5Goldfish 7–8Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Goldfish · 10 inSiamese algae eater · 6 in0"2"4"6"8"10"
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

GoldfishSiamese algae eater
Temperature60–74 °F75–79 °F
pH7–86.5–7.5
Adult size10.0 in6.0 in
Minimum tank40 gal30 gal
TemperamentPeacefulPeaceful
Swims atAll levelsBottom
GroupAlone or in pairsAlone or in pairs
DietOmnivoreHerbivore

Better tank mates for goldfish

All goldfish tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can goldfish live with siamese algae eaters?

No. Goldfish and siamese algae eaters should not share a tank. Goldfish are coldwater animals (60–74°F); siamese algae eaters need 75–79°F. No temperature suits both.

What temperature suits both goldfish and siamese algae eaters?

None. Goldfish need 60–74 °F and siamese algae eaters need 75–79 °F, so the ranges do not meet.

What size tank do goldfish and siamese algae eaters need together?

At least 40 gal, set by the goldfish. Add space for each extra fish.