PAK BOSS™ controls odours originating from waste water holding tanks (BLACK & GREY).PAK BOSS™ is convenient and easy to use without messy spills.Each packet dissolves rapidly in water and will not clog pipes, pumps or valves.Continued use of PAK BOSS™ will keep holding tanks and sensors clean and operational while lubricating valves and seals.100 % Biodegradable.STORAGE & DISPOSAL: Keep packets dry by resealing pouch after each use. Store in a cool, dry and well-ventilated area in original pouch. Dispose of empty pouch in trash.