Help ID fast moving critters from brown dust on glass

[Robin777]

Hey guys!
It’s from a brown film on the glass that turns to dust when I scrape it off! I imagine it is diatoms, under the microscope they are moving around very fast, but my magnification isn’t enough for me to see them up close, maybe someone recognizes it!

Peace
Robin

 

[Dan_P]

Hey guys!
It’s from a brown film on the glass that turns to dust when I scrape it off! I imagine it is diatoms, under the microscope they are moving around very fast, but my magnification isn’t enough for me to see them up close, maybe someone recognizes it!

Peace
Robin

I will go out on a limb and say diatoms are not fast swimmers. Maybe you are seeing dinoflagellates. If it was a green film, I would say it is not a dinoflagellate.

 

[Robin777]

Okey, I’ll get a better microscope so I can better identify!