Can red tail sharks live with blue gouramis?

Verdict
Yes

Yes. Red tail sharks and blue gouramis make a good pair. Both are fine at 72–79°F. Plan on at least 55 gal.

Red tail sharkRed tail shark72–79°F · pH 6.5–7.5 Blue gouramiBlue gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Red tail shark 72–79°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Red tail shark 6.5–7.5Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Red tail shark · 5 inBlue gourami · 5 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

Red tail sharkBlue gourami
Temperature72–79 °F72–82 °F
pH6.5–7.56–8
Adult size5.0 in5.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomTop
GroupOne per tankAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for red tail sharks

All red tail shark tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can red tail sharks live with blue gouramis?

Yes. Red tail sharks and blue gouramis make a good pair. Both are fine at 72–79°F. Plan on at least 55 gal.

What temperature suits both red tail sharks and blue gouramis?

72–79 °F. Red tail sharks need 72–79 °F, blue gouramis need 72–82 °F.

What size tank do red tail sharks and blue gouramis need together?

At least 55 gal, set by the red tail shark. Add space for each extra fish.