Student Project Figures Figure 5 Figure 5. Algae filtration rate (106cells/mL/hour) of Saccostrea glomerata oysters at four pH levels of sulphuric acid contaminated seawater. pH levels include 6.0, 6.9, 7.4 and 8.1 (control), respectively. Letters denote differences among Treatments as determined by post hoc TukeyHSD comparisons at 95% confidence. Treatments that share a letter are not significantly different. Treatments that do not share a letter are significantly different (p<0.05). Created in RStudio. Figure 4 Figure 5