| The white spots caused by ich are about the size of a grain of salt and are easy to scrape off. Since you do not have ich, you do not need to scrape off the entire thing.
Use a cover slip, knife or scalpal to scrape off a little of the stuff and mash it between a slide and cover slip. Under the scope the cells will look overgrown and "frothy" if it's Lymphosistis. The cells will not be moving around.
I still think that what your fish need most is more space and better water.
-st e |