Regular tank water will do for your snail. Do QT any you get because you don't know where they've been or what they may carry. Any snails I get go into other tanks--I have 7 tanks. I plan to get a puffer tank later, and extra snails will go there. Puffers eat snails.
Okay thanks, how long should I QT them? And is there something I can add to the water to make sure they don't have anything, because someone told me to put a small amount of aquarium salt in my QT tank but is salt safe for snails?