Hi, so I cleaned my tank up except scraping the glass to help with phosphate including taking some of the green hair algae off the walls and some of the rocks that I could. But, what are these on the glass? They don’t move. I do have snails and copepods on the glass but not that big. I turned the light on to show what I’m talking about. It’s been here for the last three days or so and all over the glass.