This invention relates to synergistic combinations of selected isothiazolin-3-one microbicides in combination with a second microbicide or formulation ingredient or raw material. The bladder support system includes a bladder unit fillable with a fluid, a base member comprised of a sheet structure, wherein the base member is positioned adjacent to the bladder unit and a plurality of straps attached to the base member. The first pulse width adjusting unit receives an input instruction signal and selectively adjusts a pulse width of the input instruction signal to generate an adjusted input instruction signal according to a first pulse width adjustment.