I’ve had this fuzzy green algae for a while that only seems to grow on the glass. It’s pretty tough and doesn’t come off easy with the magnet glass cleaner. I need to scrape it off with a razor blade, but it comes back pretty quick. I do have snails on the glass that do seem to eat it a bit, but don’t do much. It doesn’t look like it grows anywhere else. It can get pretty thick on the glass, but doesn’t seem to get any longer than like 1mm. NO3 and PO4 are usually pretty low. I’ve had Dino issues before and had to dose them, but haven’t had any Dino’s in a while. Any ideas?