The different pore-sized membranes, 0.22 µm, 0.45 µm, 1 µm, 3 µm, 5 µm were used and the legend f/2 meaning straight media with no Pseudobodo sp. KD51 served as the control. C. vulgaris was inoculated with both the control and treatment group for about 8 days, thereafter, the Chlorophyll α was determined. All data were mean± 1.SE (n = 3).