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Unlike the results for the 9.5mm tube, there isn't a sharp increase in the turbidity. Although the turbidity of the effluent water increases, the increase in the turbidity is minimal compared to the 9.5 mm tube. Although the tubidity is slightly higher than our standard of 1 NTU, this is not a significant enough difference to assume that floc roll-up has occured. Thus, there is no clear evidence of floc roll up.