This was as zoomed in as I could get, they’re tinier than poppy seeds, but they don’t seem to move, although it’s hard to tell with how small there are. I feel like the sheer quantity of them rules out fish eggs, could it be some sort of mold or algae? I do have an algae issue on the sides of the tank but I’ve never seen this before. I haven’t added anything new to my tank in over a year.