What are the clumps visible in Trypan Blue staining of IMk seawater medium in a dinoflagellate culture?

I have a question about growing dinoflagellates in IMK seawater medium. I count them by staining 1:1 with a 0.4% Trypan Blue solution. I have checked that the Trypan Blue and the medium itself are...

14 March 2019 5,230 1 View