So, I'm planning on breeding nerite snails in brackish water as loach food. However, the ones I get from the store will be used to fresh water, and, when I put the offspring in fresh water to feed the loaches, I'd prefer it if they didn't die before the loaches eat them. So. My question is this. How do I aclimate the nerite snails from brackish water to fresh, and vica versa? Also, how old do the nerite offspring need to be before they can survive in fresh water at all?