I just bought 2 more nerite snails for my aquarium. I haven’t put them in the tank yet as I just got home. I just noticed one of the snails has these large white things on it’s shell and the shell is sort of discolored. What could it be? Picture is provided.
I always quarantine my snails in a big jar with regular water changes for a month. I would try that to be sure you didn't introduce any hitchhikers, that will die off without a fish host. And I'd try to remove the barnacle probably. I don't think it will hurt, but just to be cautious.