One of my nerite snails was moving along the glass this am. I just saw these white spots. Are they eggs and was I correctly told that they will not breed in fresh water only brackish? So the eggs will just go away right?
It looks like Nerite eggs. The key to getting those off the glass is to do it right when you see them. If they harden, its takes a lot of work ( even with a razor blade ) to scrape them off completely. OR you can leave them alone but they take literally a year or so to fade away and then there's still residual on the glass.
The good thing is, they DO stop laying eggs after awhile. I have 3 Nerites who used to lay eggs everywhere - even on my Mystery snail
but after about 2-3 years, they stopped! Just like that. They are 6 + years old and have not seen a single egg from them!