Clean, Deodorize & Maintain Marine Water Tanks Naturally - SolutionsHOCl offers an eco-friendly powder solution for cleaning and deodorizing your boat water tank, marine plumbing system, or RV black tank. When sodium-based NaDCC dissolves, it produces hypochlorous acid (HOCl)—a powerful yet gentle cleaning agent known for breaking down biofilm, calcium scale. Ideal for black tank treatment, marine water tank flushing, and odor elimination. Great for portable waste tanks, grey water tank treatment, and septic tank maintenance Dissolves hard water deposits, restores flow, and keeps your system smelling fresh. Safe, Simple, and Backed by Science. Made with sodium bicarbonate, citric acid, and natural enzymes, this formula is non-toxic, non-corrosive, and safe for use around your boat's plumbing, seals, and fittings. Use it as a regular fresh water tank cleaner or RV tank cleaner powder — just pour it in and let it do the work. Note: Not yet EPA Certified for drinking water purification. Use for cleaning and deodorizing only