I would like some help identifying this snail! I noticed one a few of them, no recent plant additions, but its possible that they were tiny/eggs, are these rams-horn snails? Also, is there a possibility that they are a brackish-water species, I ask because I recently got the tank up to approximately 1TBSP per 10 gallons of salt as apart of ich treatment (will be in the process of water-changing out the salt over the next couple of weeks, and I like these guys, so if they need brackish, I'd like to set something up for them.
The only snails I deliberately introduced were 2 Nerite snails, a few of which I figured would hatch from the salt introduction, but as far as I know they should not start with a different shell-shape.