Can bichirs live with silver dollars?

Verdict
Yes

Yes, bichirs and silver dollars can live together. Both are fine at 75–82°F. Plan on at least 75 gal.

BichirBichir72–82°F · pH 6.5–7.5 Silver dollarSilver dollar75–82°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Bichir 72–82°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7Bichir 6.5–7.5Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Bichir · 12 inSilver dollar · 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

BichirSilver dollar
Temperature72–82 °F75–82 °F
pH6.5–7.55–7
Adult size12.0 in6.0 in
Minimum tank75 gal75 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 5+
DietCarnivoreHerbivore

Better tank mates for bichirs

All bichir tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can bichirs live with silver dollars?

Yes, bichirs and silver dollars can live together. Both are fine at 75–82°F. Plan on at least 75 gal.

What temperature suits both bichirs and silver dollars?

75–82 °F. Bichirs need 72–82 °F, silver dollars need 75–82 °F.

What size tank do bichirs and silver dollars need together?

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