Snails aren't doing much...
I bought a snail to put in with my betta in 5gal, filtered/heated.
The snail moved a lot on day #1, up the glass, everywhere. It has barely moved in 3 days since. I dont think it's dead, there is no smell, and when I picked it up it sealed shut.
Do these things sleep a lot? They were a lot more fun on day #1 than they are now.