Can red tail sharks live with assassin snails?

Verdict
Yes

Yes. Red tail sharks and assassin snails make a good pair. Both are fine at 75–79°F. Plan on at least 55 gal.

Red tail sharkRed tail shark72–79°F · pH 6.5–7.5 Assassin snailAssassin snail75–80°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Red tail shark 72–79°Assassin snail 75–80°
The green band is the temperature range both can live in.
456789Both: 7–7.5Red tail shark 6.5–7.5Assassin snail 7–8
The green band is the pH both tolerate.

Size to scale

Red tail shark · 5 inAssassin snail · 1 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 sharkAssassin snail
Temperature72–79 °F75–80 °F
pH6.5–7.57–8
Adult size5.0 in1.0 in
Minimum tank55 gal5 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomBottom
GroupOne per tankAlone or in pairs
DietOmnivoreCarnivore

Better tank mates for red tail sharks

All red tail shark tank mates

Better tank mates for assassin snails

All assassin snail tank mates

Questions

Can red tail sharks live with assassin snails?

Yes. Red tail sharks and assassin snails make a good pair. Both are fine at 75–79°F. Plan on at least 55 gal.

What temperature suits both red tail sharks and assassin snails?

75–79 °F. Red tail sharks need 72–79 °F, assassin snails need 75–80 °F.

What size tank do red tail sharks and assassin snails need together?

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