If I am able to buy nerite snails from a saltwater aquarium store, could I slowly acclimate the snails to fresh water ok? Or would it be too much of a difference? I drip-acclimate for about 45 min. with all fish.
I think that you would have to acclimate them slower than that, and it would also depend on which kind of nerite. Here is a post dealing with acclimation from fw to bw, it might be of some help to you: http://www.aquariacentral.com/forums/showthread.php?t=146026