So I had a smallish algae bloom last week and I wasn't sure why, so I went ahead and bought an Oto since I had previously taken out one of my barbs. Anyway, he (maybe she?) cleared out nearly all of the brown algae in one night but when I looked closer I saw this... Now I'm not sure what this is, but he doesn't really seem to be eating it. I sort of recall someone else talking about these white things on their glass. They kind of flow and wave along with the flow of the water while staying attached to the glass. Can anyone either point me to that thread or, if you know, tell me what this stuff is and what I should do with it?