Can siamese algae eaters live with firemouth cichlids?

Verdict
Yes

Yes. Siamese algae eaters and firemouth cichlids make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

Siamese algae eaterSiamese algae eater75–79°F · pH 6.5–7.5 Firemouth cichlidFiremouth cichlid75–86°F · pH 6.5–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Siamese algae eater 75–79°Firemouth cichlid 75–86°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Siamese algae eater 6.5–7.5Firemouth cichlid 6.5–8
The green band is the pH both tolerate.

Size to scale

Siamese algae eater · 6 inFiremouth cichlid · 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

Siamese algae eaterFiremouth cichlid
Temperature75–79 °F75–86 °F
pH6.5–7.56.5–8
Adult size6.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomBottom
GroupAlone or in pairsAlone or in pairs
DietHerbivoreOmnivore

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Better tank mates for firemouth cichlids

All firemouth cichlid tank mates

Questions

Can siamese algae eaters live with firemouth cichlids?

Yes. Siamese algae eaters and firemouth cichlids make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both siamese algae eaters and firemouth cichlids?

75–79 °F. Siamese algae eaters need 75–79 °F, firemouth cichlids need 75–86 °F.

What size tank do siamese algae eaters and firemouth cichlids need together?

At least 30 gal, set by the siamese algae eater. Add space for each extra fish.