There are these white, seemingly stationary, things on the glass in my aquarium. They do not move and appear to be stuck to the glass...meaning when I take a finger nail to them they sort of pop off. They are about the size of a head of a pin and appear to be multiplying, Without actually moving. They barely rise off the glass, meaning there isn't much of a bump that they make. I'm working on a pic but honestly, I can't get a good shot...too small. When looking at them from the bottom, it appears like they have a shell, but are again nearly flush to the glass, but you can see a change in color to what I believe would be their flesh in the center.
Any ideas?
Any ideas?