Can discus live with assassin snails?

Verdict
No

No. Discus and assassin snails should not share a tank. No shared temperature. Discus need 82–88°F, assassin snails need 75–80°F.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°Assassin snail 75–80°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 7Discus 5.5–7Assassin snail 7–8
The green band is the pH both tolerate.

Size to scale

Discus · 6 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

DiscusAssassin snail
Temperature82–88 °F75–80 °F
pH5.5–77–8
Adult size6.0 in1.0 in
Minimum tank55 gal5 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 5+Alone or in pairs
DietCarnivoreCarnivore

Better tank mates for discus

All discus tank mates

Better tank mates for assassin snails

All assassin snail tank mates

Questions

Can discus live with assassin snails?

No. Discus and assassin snails should not share a tank. No shared temperature. Discus need 82–88°F, assassin snails need 75–80°F.

What temperature suits both discus and assassin snails?

None. Discus need 82–88 °F and assassin snails need 75–80 °F, so the ranges do not meet.

What size tank do discus and assassin snails need together?

At least 55 gal, set by the discus. Add space for each extra fish.