Can crayfish live with chinese algae eaters?

Verdict
Yes

Yes. Crayfish and chinese algae eaters get along in the same tank. Both are fine at 74–77°F. Plan on at least 75 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Chinese algae eaterChinese algae eater74–80°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–77°Crayfish 65–77°Chinese algae eater 74–80°
The green band is the temperature range both can live in.
456789Both: 6.5–8Crayfish 6.5–8Chinese algae eater 6–8
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inChinese algae eater · 10 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

CrayfishChinese algae eater
Temperature65–77 °F74–80 °F
pH6.5–86–8
Adult size5.0 in10.0 in
Minimum tank20 gal75 gal
TemperamentAggressiveSemi-aggressive
Swims atBottomBottom
GroupOne per tankAlone or in pairs
DietOmnivoreHerbivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for chinese algae eaters

All chinese algae eater tank mates

Questions

Can crayfish live with chinese algae eaters?

Yes. Crayfish and chinese algae eaters get along in the same tank. Both are fine at 74–77°F. Plan on at least 75 gal.

What temperature suits both crayfish and chinese algae eaters?

74–77 °F. Crayfish need 65–77 °F, chinese algae eaters need 74–80 °F.

What size tank do crayfish and chinese algae eaters need together?

At least 75 gal, set by the chinese algae eater. Add space for each extra fish.