Dear Puspita,

I think you will find the following link useful as well as the attached pdf. It is the European standard according to which I do my research. You should review the research done so far in this area in your region or geographically and climatically similar regions. http://www.aqem.de/

All the best,

Nikola

I think this book can help you

Phytoplankton is best captured by sedimentation or filtration of a water sample. The Utermöhl method is a method in which plankton sediment, and can be counted in an inverted microscope. When filtering with a membrane filter, the dry filter can be examined under an ordinary microscope. The filter becomes transparent by wetting it with immersion oil or the like. Plankton sample taken on a membrane filter.

Thank you so much for the answers.