I am a 9th grade student from Manila and we're currently working on an investigatory project. We want to know how effective SODIS or solar water disinfection is. The purification method claims to be able to kill pathogen. We've just finished our methodology; we have not done to experiment yet.
There's one thing that concerns us: is it even possible to see pathogen in water using a microscope? We raised our concern to our teacher and at first she believes it is possible. However, she said that she was not sure because she mentioned that some stuff (I forgot what) are "cultured" before checking for pathogen like bacteria.