I got a golden snail last Friday (4 days ago) and it hasn't moved at all since. I put it in my bettas tank and he only messed with it for a couple minutes then seems to ignore it. O did the smell test yesterday to make sure it wasn't dead, and it was fine. It's shell is also starting to turn white. Should I be concerned with the white shell and absolutely no movement? Or is it just getting used to everything...still?