A faulty temperature gauge in an enclosure froze them!
yes it does kill snails
YES
salt.
yes it can
There are many chemicals that will kill freshwater snails but they will also kill fish and some will kill plants too. The best way I have found to remove snails is to have a few Clown loaches (Botia macracantha) or a couple of freshwater Puffer fish to kill and eat them.
kill them
No, snails don't kill frogs they actual help frogs by eating harmful bacteria.
Yes, Some cone snails have paralytic toxins that can actually kill a person in seconds
It is not advised to feed celery to snails as it's been known to kill them.
Most types of snails eat only vegetation, however, there does exist a predatory snail that eats other snails.
put salt on them, it will kill them instantly!!
NO!