Can bichirs live with siamese algae eaters?

Verdict
Yes

Yes, bichirs and siamese algae eaters can live together. Both are fine at 75–79°F. Plan on at least 75 gal.

BichirBichir72–82°F · pH 6.5–7.5 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°Bichir 72–82°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Bichir 6.5–7.5Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Bichir · 12 inSiamese algae eater · 6 in0"2"4"6"8"10"12"
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

BichirSiamese algae eater
Temperature72–82 °F75–79 °F
pH6.5–7.56.5–7.5
Adult size12.0 in6.0 in
Minimum tank75 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomBottom
GroupAlone or in pairsAlone or in pairs
DietCarnivoreHerbivore

Better tank mates for bichirs

All bichir tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can bichirs live with siamese algae eaters?

Yes, bichirs and siamese algae eaters can live together. Both are fine at 75–79°F. Plan on at least 75 gal.

What temperature suits both bichirs and siamese algae eaters?

75–79 °F. Bichirs need 72–82 °F, siamese algae eaters need 75–79 °F.

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

At least 75 gal, set by the bichir. Add space for each extra fish.