OK, I have eggs on the glass of my aquarium. They're little white dots some close together some not. They look like cory eggs but I only have one cory, the other died a few months ago. So they more than likely aren't fertile, if they're cory eggs correct? I also have blue snails in there but they usually lay there eggs above the water line in clusters so I don't think it's them. The only other fish in there are tetras (rummy nose and emperor).