Can bristlenose plecos live with rummy nose tetras?

Verdict
Yes

Yes. Bristlenose plecos and rummy nose tetras get along in the same tank. Both are fine at 75–81°F. Plan on at least 30 gal.

Bristlenose plecoBristlenose pleco73–81°F · pH 6.5–7.5 Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–81°Bristlenose pleco 73–81°Rummy nose tetra 75–84°
The green band is the temperature range both can live in.
456789Both: 6.5–7Bristlenose pleco 6.5–7.5Rummy nose tetra 5.5–7
The green band is the pH both tolerate.

Size to scale

Bristlenose pleco · 5 inRummy nose tetra · 2 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

Bristlenose plecoRummy nose tetra
Temperature73–81 °F75–84 °F
pH6.5–7.55.5–7
Adult size5.0 in2.0 in
Minimum tank30 gal20 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietHerbivoreOmnivore

Better tank mates for bristlenose plecos

All bristlenose pleco tank mates

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Questions

Can bristlenose plecos live with rummy nose tetras?

Yes. Bristlenose plecos and rummy nose tetras get along in the same tank. Both are fine at 75–81°F. Plan on at least 30 gal.

What temperature suits both bristlenose plecos and rummy nose tetras?

75–81 °F. Bristlenose plecos need 73–81 °F, rummy nose tetras need 75–84 °F.

What size tank do bristlenose plecos and rummy nose tetras need together?

At least 30 gal, set by the bristlenose pleco. Add space for each extra fish.