There is a FB group that will help you analyze the microscope pics and tell you exactly what to do. I plan to take some photos of my brown stuff, and post it over there.
I have a nasty dino I'm fighting. Nitrates are 15.6 phosphates .26 to .44 uv running, ozone, change socks every morning, temp is 81.5. DINOS JUST PLAN SUCK. Silicate consume same food as dinos.