PORT | Holding Tank TreatmentPORT is a powerful outdoor restroom and holding tank treatment that provides rapid waste degradation and odor control. PORT efficiently and effectively breaks down solid waste, clears bio solids in septic systems and opens up clogged pipes, often adding years between tank pumping. Benefits of PORT: Eliminates unpleasant odors rather than simply covering them up with perfumes or fragrances Harmless to human, animal and marine life Digests difficult